80731025990 has 32 divisors (see below), whose sum is σ = 147829100544. Its totient is φ = 31738664160.

The previous prime is 80731025987. The next prime is 80731026017. The reversal of 80731025990 is 9952013708.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161156 + ... + 432935.

It is an arithmetic number, because the mean of its divisors is an integer number (4619659392).

Almost surely, 2^80731025990 is an apocalyptic number.

80731025990 is a deficient number, since it is larger than the sum of its proper divisors (67098074554).

80731025990 is a wasteful number, since it uses less digits than its factorization.

80731025990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594332.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 80731025990 in words is "eighty billion, seven hundred thirty-one million, twenty-five thousand, nine hundred ninety".