80318900864 has 16 divisors (see below), whose sum is σ = 160010310570. Its totient is φ = 40159450368.

The previous prime is 80318900863. The next prime is 80318900867. The reversal of 80318900864 is 46800981308.

It can be written as a sum of positive squares in only one way, i.e., 71631169600 + 8687731264 = 267640^2 + 93208^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×80318900864² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80318900863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313745579 + ... + 313745834.

Almost surely, 2^80318900864 is an apocalyptic number.

It is an amenable number.

80318900864 is a deficient number, since it is larger than the sum of its proper divisors (79691409706).

80318900864 is an equidigital number, since it uses as much as digits as its factorization.

80318900864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627491427 (or 627491415 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 80318900864 in words is "eighty billion, three hundred eighteen million, nine hundred thousand, eight hundred sixty-four".