161606534412 has 48 divisors (see below), whose sum is σ = 382634122752. Its totient is φ = 53076629760.

The previous prime is 161606534407. The next prime is 161606534437. The reversal of 161606534412 is 214435606161.

It is a super-2 number, since 2×161606534412² (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 15 ways as a sum of consecutive naturals, for example, 1310148 + ... + 1428180.

It is an arithmetic number, because the mean of its divisors is an integer number (7971544224).

Almost surely, 2^161606534412 is an apocalyptic number.

161606534412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161606534412 is an abundant number, since it is smaller than the sum of its proper divisors (221027588340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161606534412 is a wasteful number, since it uses less digits than its factorization.

161606534412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119718 (or 119716 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 161606534412 in words is "one hundred sixty-one billion, six hundred six million, five hundred thirty-four thousand, four hundred twelve".