161580785132 has 12 divisors (see below), whose sum is σ = 304517633616. Its totient is φ = 74575746960.

The previous prime is 161580785117. The next prime is 161580785137. The reversal of 161580785132 is 231587085161.

It is a super-2 number, since 2×161580785132² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161580785137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1553661344 + ... + 1553661447.

It is an arithmetic number, because the mean of its divisors is an integer number (25376469468).

Almost surely, 2^161580785132 is an apocalyptic number.

It is an amenable number.

161580785132 is a deficient number, since it is larger than the sum of its proper divisors (142936848484).

161580785132 is a wasteful number, since it uses less digits than its factorization.

161580785132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107322808 (or 3107322806 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 161580785132 in words is "one hundred sixty-one billion, five hundred eighty million, seven hundred eighty-five thousand, one hundred thirty-two".