7921081755162 has 48 divisors (see below), whose sum is σ = 17917030989000. Its totient is φ = 2525925451392.

The previous prime is 7921081755151. The next prime is 7921081755179. The reversal of 7921081755162 is 2615571801297.

7921081755162 is a `hidden beast` number, since 7 + 9 + 2 + 1 + 0 + 81 + 7 + 551 + 6 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7862589848961 + 58491906201 = 2804031^2 + 241851^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7921081755099 and 7921081755108.

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, 69550837 + ... + 69664632.

Almost surely, 2^{7921081755162} is an apocalyptic number.

7921081755162 is an abundant number, since it is smaller than the sum of its proper divisors (9995949233838).

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

7921081755162 is a wasteful number, since it uses less digits than its factorization.

7921081755162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139215615 (or 139215612 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 54.

The spelling of 7921081755162 in words is "seven trillion, nine hundred twenty-one billion, eighty-one million, seven hundred fifty-five thousand, one hundred sixty-two".