161616610111570 has 16 divisors (see below), whose sum is σ = 294592301976960. Its totient is φ = 63828332094384.

The previous prime is 161616610111513. The next prime is 161616610111571. The reversal of 161616610111570 is 75111016616161.

It is a super-2 number, since 2×161616610111570² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161616610111571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102288992952 + ... + 102288994531.

It is an arithmetic number, because the mean of its divisors is an integer number (18412018873560).

Almost surely, 2^{161616610111570} is an apocalyptic number.

161616610111570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161616610111570 is a deficient number, since it is larger than the sum of its proper divisors (132975691865390).

161616610111570 is a wasteful number, since it uses less digits than its factorization.

161616610111570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204577987569.

The product of its (nonzero) digits is 45360, while the sum is 43.

The spelling of 161616610111570 in words is "one hundred sixty-one trillion, six hundred sixteen billion, six hundred ten million, one hundred eleven thousand, five hundred seventy".