77957416 has 8 divisors (see below), whose sum is σ = 146170170. Its totient is φ = 38978704.

The previous prime is 77957413. The next prime is 77957417. The reversal of 77957416 is 61475977.

It can be written as a sum of positive squares in only one way, i.e., 74753316 + 3204100 = 8646^2 + 1790^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77957413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4872331 + ... + 4872346.

Almost surely, 2^77957416 is an apocalyptic number.

It is an amenable number.

77957416 is a deficient number, since it is larger than the sum of its proper divisors (68212754).

77957416 is a wasteful number, since it uses less digits than its factorization.

77957416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744683 (or 9744679 counting only the distinct ones).

The product of its digits is 370440, while the sum is 46.

The square root of 77957416 is about 8829.3496929276. The cubic root of 77957416 is about 427.1880989311.

The spelling of 77957416 in words is "seventy-seven million, nine hundred fifty-seven thousand, four hundred sixteen".