77968156 has 24 divisors (see below), whose sum is σ = 156316160. Its totient is φ = 33333552.

The previous prime is 77968151. The next prime is 77968157. The reversal of 77968156 is 65186977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77968151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9121 + ... + 15463.

Almost surely, 2^77968156 is an apocalyptic number.

It is an amenable number.

77968156 is an abundant number, since it is smaller than the sum of its proper divisors (78348004).

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

77968156 is a wasteful number, since it uses less digits than its factorization.

77968156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6793 (or 6791 counting only the distinct ones).

The product of its digits is 635040, while the sum is 49.

The square root of 77968156 is about 8829.9578707942. The cubic root of 77968156 is about 427.2077155788.

The spelling of 77968156 in words is "seventy-seven million, nine hundred sixty-eight thousand, one hundred fifty-six".