77431168 has 16 divisors (see below), whose sum is σ = 154257660. Its totient is φ = 38715520.

The previous prime is 77431147. The next prime is 77431171. The reversal of 77431168 is 86113477.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302338 + ... + 302593.

Almost surely, 2^77431168 is an apocalyptic number.

It is an amenable number.

77431168 is a deficient number, since it is larger than the sum of its proper divisors (76826492).

77431168 is an equidigital number, since it uses as much as digits as its factorization.

77431168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604945 (or 604933 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 77431168 is about 8799.4981675093. The cubic root of 77431168 is about 426.2246898913.

It can be divided in two parts, 7743 and 1168, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 77431168 in words is "seventy-seven million, four hundred thirty-one thousand, one hundred sixty-eight".