1215725456352 has 96 divisors (see below), whose sum is σ = 3482737896960. Its totient is φ = 368259614720.

The previous prime is 1215725456347. The next prime is 1215725456357. The reversal of 1215725456352 is 2536545275121.

It is an interprime number because it is at equal distance from previous prime (1215725456347) and next prime (1215725456357).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215725456357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2534473 + ... + 2975735.

It is an arithmetic number, because the mean of its divisors is an integer number (36278519760).

Almost surely, 2^{1215725456352} is an apocalyptic number.

1215725456352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215725456352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741368948480).

1215725456352 is an abundant number, since it is smaller than the sum of its proper divisors (2267012440608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215725456352 is a wasteful number, since it uses less digits than its factorization.

1215725456352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443896 (or 443888 counting only the distinct ones).

The product of its digits is 2520000, while the sum is 48.

The spelling of 1215725456352 in words is "one trillion, two hundred fifteen billion, seven hundred twenty-five million, four hundred fifty-six thousand, three hundred fifty-two".