77204903638 has 16 divisors (see below), whose sum is σ = 117719211024. Its totient is φ = 37965310560.

The previous prime is 77204903627. The next prime is 77204903647. The reversal of 77204903638 is 83630940277.

It is a junction number, because it is equal to n+sod(n) for n = 77204903591 and 77204903600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221756 + ... + 1283392.

It is an arithmetic number, because the mean of its divisors is an integer number (7357450689).

Almost surely, 2^77204903638 is an apocalyptic number.

77204903638 is a deficient number, since it is larger than the sum of its proper divisors (40514307386).

77204903638 is a wasteful number, since it uses less digits than its factorization.

77204903638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71967.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 77204903638 in words is "seventy-seven billion, two hundred four million, nine hundred three thousand, six hundred thirty-eight".