77161008 has 40 divisors (see below), whose sum is σ = 201280768. Its totient is φ = 25468992.

The previous prime is 77161001. The next prime is 77161031. The reversal of 77161008 is 80016177.

It is not an unprimeable number, because it can be changed into a prime (77161001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2860 + ... + 12747.

Almost surely, 2^77161008 is an apocalyptic number.

It is an amenable number.

77161008 is an abundant number, since it is smaller than the sum of its proper divisors (124119760).

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

77161008 is a wasteful number, since it uses less digits than its factorization.

77161008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15721 (or 15715 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 77161008 is about 8784.1338787612. The cubic root of 77161008 is about 425.7284080760.

Subtracting from 77161008 its product of nonzero digits (2352), we obtain a square (77158656 = 8784²).

The spelling of 77161008 in words is "seventy-seven million, one hundred sixty-one thousand, eight".