1265722445952 has 192 divisors, whose sum is σ = 3713343341760. Its totient is φ = 413682247680.

The previous prime is 1265722445887. The next prime is 1265722445971. The reversal of 1265722445952 is 2595442275621.

1265722445952 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 7 + 2 + 2 + 44 + 595 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×1265722445952² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 110566693 + ... + 110578139.

It is an arithmetic number, because the mean of its divisors is an integer number (19340329905).

Almost surely, 2^{1265722445952} is an apocalyptic number.

1265722445952 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 1265722445952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1856671670880).

1265722445952 is an abundant number, since it is smaller than the sum of its proper divisors (2447620895808).

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

1265722445952 is a wasteful number, since it uses less digits than its factorization.

1265722445952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13331 (or 13316 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 1265722445952 in words is "one trillion, two hundred sixty-five billion, seven hundred twenty-two million, four hundred forty-five thousand, nine hundred fifty-two".