77538536 has 16 divisors (see below), whose sum is σ = 145579140. Its totient is φ = 38717440.

The previous prime is 77538511. The next prime is 77538541. The reversal of 77538536 is 63583577.

It can be written as a sum of positive squares in 2 ways, for example, as 75864100 + 1674436 = 8710^2 + 1294^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 296 + ... + 12456.

Almost surely, 2^77538536 is an apocalyptic number.

It is an amenable number.

77538536 is a deficient number, since it is larger than the sum of its proper divisors (68040604).

77538536 is a wasteful number, since it uses less digits than its factorization.

77538536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12964 (or 12960 counting only the distinct ones).

The product of its digits is 529200, while the sum is 44.

The square root of 77538536 is about 8805.5968565453. The cubic root of 77538536 is about 426.4216035200.

The spelling of 77538536 in words is "seventy-seven million, five hundred thirty-eight thousand, five hundred thirty-six".