160977640 has 32 divisors (see below), whose sum is σ = 362779560. Its totient is φ = 64288000.

The previous prime is 160977623. The next prime is 160977673. The reversal of 160977640 is 46779061.

It can be written as a sum of positive squares in 4 ways, for example, as 150258564 + 10719076 = 12258^2 + 3274^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 160977593 and 160977602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25170 + ... + 30910.

Almost surely, 2^160977640 is an apocalyptic number.

160977640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

160977640 is an abundant number, since it is smaller than the sum of its proper divisors (201801920).

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

160977640 is a wasteful number, since it uses less digits than its factorization.

160977640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453 (or 6449 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 160977640 is about 12687.6964024207. The cubic root of 160977640 is about 543.9869968778.

The spelling of 160977640 in words is "one hundred sixty million, nine hundred seventy-seven thousand, six hundred forty".