77157831522 has 16 divisors (see below), whose sum is σ = 155168237952. Its totient is φ = 25577181360.

The previous prime is 77157831497. The next prime is 77157831533. The reversal of 77157831522 is 22513875177.

It is a happy 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, 35522778 + ... + 35524949.

It is an arithmetic number, because the mean of its divisors is an integer number (9698014872).

Almost surely, 2^77157831522 is an apocalyptic number.

77157831522 is an abundant number, since it is smaller than the sum of its proper divisors (78010406430).

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

77157831522 is a wasteful number, since it uses less digits than its factorization.

77157831522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71047913.

The product of its digits is 823200, while the sum is 48.

The spelling of 77157831522 in words is "seventy-seven billion, one hundred fifty-seven million, eight hundred thirty-one thousand, five hundred twenty-two".