161020242525656 has 32 divisors (see below), whose sum is σ = 303375493471680. Its totient is φ = 80120190612000.

The previous prime is 161020242525619. The next prime is 161020242525661. The reversal of 161020242525656 is 656525242020161.

It is a self number, because there is not a number n which added to its sum of digits gives 161020242525656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11207831 + ... + 21157881.

It is an arithmetic number, because the mean of its divisors is an integer number (9480484170990).

Almost surely, 2^{161020242525656} is an apocalyptic number.

It is an amenable number.

161020242525656 is a deficient number, since it is larger than the sum of its proper divisors (142355250946024).

161020242525656 is a wasteful number, since it uses less digits than its factorization.

161020242525656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9959855 (or 9959851 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 161020242525656 in words is "one hundred sixty-one trillion, twenty billion, two hundred forty-two million, five hundred twenty-five thousand, six hundred fifty-six".