161601336136 has 16 divisors (see below), whose sum is σ = 303019454700. Its totient is φ = 80796148224.

The previous prime is 161601336131. The next prime is 161601336151. The reversal of 161601336136 is 631633106161.

It can be written as a sum of positive squares in 2 ways, for example, as 131950562500 + 29650773636 = 363250^2 + 172194^2 .

It is a super-2 number, since 2×161601336136² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161601336095 and 161601336104.

It is not an unprimeable number, because it can be changed into a prime (161601336131) 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, 410545 + ... + 701248.

Almost surely, 2^161601336136 is an apocalyptic number.

It is an amenable number.

161601336136 is a deficient number, since it is larger than the sum of its proper divisors (141418118564).

161601336136 is a wasteful number, since it uses less digits than its factorization.

161601336136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129968 (or 1129964 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 161601336136 in words is "one hundred sixty-one billion, six hundred one million, three hundred thirty-six thousand, one hundred thirty-six".