161040402170 has 16 divisors (see below), whose sum is σ = 290561265288. Its totient is φ = 64263151680.

The previous prime is 161040402163. The next prime is 161040402233. The reversal of 161040402170 is 71204040161.

It can be written as a sum of positive squares in 4 ways, for example, as 95628759121 + 65411643049 = 309239^2 + 255757^2 .

It is a super-2 number, since 2×161040402170² (a number of 23 digits) contains 22 as substring.

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, 19121729 + ... + 19130148.

Almost surely, 2^161040402170 is an apocalyptic number.

161040402170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161040402170 is a deficient number, since it is larger than the sum of its proper divisors (129520863118).

161040402170 is a wasteful number, since it uses less digits than its factorization.

161040402170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38252305.

The product of its (nonzero) digits is 1344, while the sum is 26.

The spelling of 161040402170 in words is "one hundred sixty-one billion, forty million, four hundred two thousand, one hundred seventy".