77640461822 has 64 divisors (see below), whose sum is σ = 148586918400. Its totient is φ = 29548471680.

The previous prime is 77640461809. The next prime is 77640461861. The reversal of 77640461822 is 22816404677.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1848329 + ... + 1889867.

It is an arithmetic number, because the mean of its divisors is an integer number (2321670600).

Almost surely, 2^77640461822 is an apocalyptic number.

77640461822 is a deficient number, since it is larger than the sum of its proper divisors (70946456578).

77640461822 is a wasteful number, since it uses less digits than its factorization.

77640461822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41841.

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 77640461822 in words is "seventy-seven billion, six hundred forty million, four hundred sixty-one thousand, eight hundred twenty-two".