77745136 has 40 divisors (see below), whose sum is σ = 172704224. Its totient is φ = 33212160.

The previous prime is 77745133. The next prime is 77745137. The reversal of 77745136 is 63154777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77745133) 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, 40846 + ... + 42706.

Almost surely, 2^77745136 is an apocalyptic number.

It is an amenable number.

77745136 is an abundant number, since it is smaller than the sum of its proper divisors (94959088).

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

77745136 is a wasteful number, since it uses less digits than its factorization.

77745136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2243 counting only the distinct ones).

The product of its digits is 123480, while the sum is 40.

The square root of 77745136 is about 8817.3202278243. The cubic root of 77745136 is about 426.7999984775.

The spelling of 77745136 in words is "seventy-seven million, seven hundred forty-five thousand, one hundred thirty-six".