161606115612 has 72 divisors (see below), whose sum is σ = 411298103216. Its totient is φ = 53500621824.

The previous prime is 161606115557. The next prime is 161606115617. The reversal of 161606115612 is 216511606161.

161606115612 is a `hidden beast` number, since 16 + 16 + 0 + 6 + 1 + 15 + 612 = 666.

It is a super-2 number, since 2×161606115612² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606115617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15158988 + ... + 15169644.

Almost surely, 2^161606115612 is an apocalyptic number.

161606115612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161606115612 is an abundant number, since it is smaller than the sum of its proper divisors (249691987604).

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

161606115612 is a wasteful number, since it uses less digits than its factorization.

161606115612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13507 (or 13502 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 161606115612 in words is "one hundred sixty-one billion, six hundred six million, one hundred fifteen thousand, six hundred twelve".