1213552364976 has 320 divisors, whose sum is σ = 4192448332800. Its totient is φ = 328326856704.

The previous prime is 1213552364971. The next prime is 1213552364977. The reversal of 1213552364976 is 6794632553121.

1213552364976 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 5 + 523 + 6 + 49 + 76 = 666.

It is a super-2 number, since 2×1213552364976² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1213552364971) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180236106 + ... + 180242838.

It is an arithmetic number, because the mean of its divisors is an integer number (13101401040).

Almost surely, 2^{1213552364976} is an apocalyptic number.

1213552364976 is a gapful number since it is divisible by the number (16) 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 1213552364976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096224166400).

1213552364976 is an abundant number, since it is smaller than the sum of its proper divisors (2978895967824).

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

1213552364976 is a wasteful number, since it uses less digits than its factorization.

1213552364976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9913 (or 9901 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 54.

The spelling of 1213552364976 in words is "one trillion, two hundred thirteen billion, five hundred fifty-two million, three hundred sixty-four thousand, nine hundred seventy-six".