161632699056 has 60 divisors (see below), whose sum is σ = 454107276792. Its totient is φ = 53667913728.

The previous prime is 161632699027. The next prime is 161632699057. The reversal of 161632699056 is 650996236161.

It is a super-2 number, since 2×161632699056² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161632698993 and 161632699011.

It is not an unprimeable number, because it can be changed into a prime (161632699057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2146746 + ... + 2220761.

Almost surely, 2^161632699056 is an apocalyptic number.

161632699056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161632699056 is an abundant number, since it is smaller than the sum of its proper divisors (292474577736).

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

161632699056 is a wasteful number, since it uses less digits than its factorization.

161632699056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367778 (or 4367769 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 161632699056 in words is "one hundred sixty-one billion, six hundred thirty-two million, six hundred ninety-nine thousand, fifty-six".