80904657616 has 40 divisors (see below), whose sum is σ = 161467446920. Its totient is φ = 39242133504.

The previous prime is 80904657557. The next prime is 80904657623. The reversal of 80904657616 is 61675640908.

It can be written as a sum of positive squares in 4 ways, for example, as 43072851600 + 37831806016 = 207540^2 + 194504^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3261 + ... + 402268.

It is an arithmetic number, because the mean of its divisors is an integer number (4036686173).

Almost surely, 2^80904657616 is an apocalyptic number.

It is an amenable number.

80904657616 is a deficient number, since it is larger than the sum of its proper divisors (80562789304).

80904657616 is a wasteful number, since it uses less digits than its factorization.

80904657616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405911 (or 405905 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 80904657616 in words is "eighty billion, nine hundred four million, six hundred fifty-seven thousand, six hundred sixteen".