77745156 has 12 divisors (see below), whose sum is σ = 181405392. Its totient is φ = 25915048.

The previous prime is 77745139. The next prime is 77745181. The reversal of 77745156 is 65154777.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3239370 + ... + 3239393.

It is an arithmetic number, because the mean of its divisors is an integer number (15117116).

Almost surely, 2^77745156 is an apocalyptic number.

It is an amenable number.

77745156 is an abundant number, since it is smaller than the sum of its proper divisors (103660236).

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

77745156 is a wasteful number, since it uses less digits than its factorization.

77745156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478770 (or 6478768 counting only the distinct ones).

The product of its digits is 205800, while the sum is 42.

The square root of 77745156 is about 8817.3213619557. The cubic root of 77745156 is about 426.8000350757.

The spelling of 77745156 in words is "seventy-seven million, seven hundred forty-five thousand, one hundred fifty-six".