91018852621056 has 216 divisors, whose sum is σ = 285767471262000. Its totient is φ = 27751664295936.

The previous prime is 91018852621051. The next prime is 91018852621069. The reversal of 91018852621056 is 65012625881019.

91018852621056 is a `hidden beast` number, since 9 + 1 + 0 + 1 + 8 + 8 + 5 + 2 + 621 + 0 + 5 + 6 = 666.

It is a super-2 number, since 2×91018852621056² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91018852620993 and 91018852621011.

It is not an unprimeable number, because it can be changed into a prime (91018852621051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34578691 + ... + 37117698.

Almost surely, 2^{91018852621056} is an apocalyptic number.

91018852621056 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

91018852621056 is an abundant number, since it is smaller than the sum of its proper divisors (194748618640944).

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

91018852621056 is a wasteful number, since it uses less digits than its factorization.

91018852621056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71696459 (or 71696442 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 91018852621056 in words is "ninety-one trillion, eighteen billion, eight hundred fifty-two million, six hundred twenty-one thousand, fifty-six".