121575835575648 has 192 divisors, whose sum is σ = 395215565472000. Its totient is φ = 36133994391552.

The previous prime is 121575835575589. The next prime is 121575835575683. The reversal of 121575835575648 is 846575538575121.

121575835575648 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 7 + 5 + 8 + 3 + 5 + 57 + 564 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217542558 + ... + 218100701.

It is an arithmetic number, because the mean of its divisors is an integer number (2058414403500).

Almost surely, 2^{121575835575648} is an apocalyptic number.

121575835575648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121575835575648 is an abundant number, since it is smaller than the sum of its proper divisors (273639729896352).

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

121575835575648 is a wasteful number, since it uses less digits than its factorization.

121575835575648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435643314 (or 435643300 counting only the distinct ones).

The product of its digits is 1411200000, while the sum is 72.

The spelling of 121575835575648 in words is "one hundred twenty-one trillion, five hundred seventy-five billion, eight hundred thirty-five million, five hundred seventy-five thousand, six hundred forty-eight".