80787595905 has 12 divisors (see below), whose sum is σ = 140031832980. Its totient is φ = 43086717792.

The previous prime is 80787595883. The next prime is 80787595909. The reversal of 80787595905 is 50959578708.

It can be written as a sum of positive squares in 2 ways, for example, as 12621174336 + 68166421569 = 112344^2 + 261087^2 .

It is not a de Polignac number, because 80787595905 - 2⁸ = 80787595649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80787595909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 897639910 + ... + 897639999.

It is an arithmetic number, because the mean of its divisors is an integer number (11669319415).

Almost surely, 2^80787595905 is an apocalyptic number.

It is an amenable number.

80787595905 is a deficient number, since it is larger than the sum of its proper divisors (59244237075).

80787595905 is a wasteful number, since it uses less digits than its factorization.

80787595905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795279920 (or 1795279917 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 63.

The spelling of 80787595905 in words is "eighty billion, seven hundred eighty-seven million, five hundred ninety-five thousand, nine hundred five".