161656653602 has 16 divisors (see below), whose sum is σ = 249072744960. Its totient is φ = 78633003888.

The previous prime is 161656653601. The next prime is 161656653619. The reversal of 161656653602 is 206356656161.

161656653602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161656653602² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161656653601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 408149 + ... + 699927.

It is an arithmetic number, because the mean of its divisors is an integer number (15567046560).

Almost surely, 2^161656653602 is an apocalyptic number.

161656653602 is a deficient number, since it is larger than the sum of its proper divisors (87416091358).

161656653602 is a wasteful number, since it uses less digits than its factorization.

161656653602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299305.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 161656653602 in words is "one hundred sixty-one billion, six hundred fifty-six million, six hundred fifty-three thousand, six hundred two".