80998992957 has 8 divisors (see below), whose sum is σ = 108002305600. Its totient is φ = 53997504480.

The previous prime is 80998992947. The next prime is 80998992959. The reversal of 80998992957 is 75929989908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80998992957 - 2⁴ = 80998992941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80998992959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348832 + ... + 532617.

It is an arithmetic number, because the mean of its divisors is an integer number (13500288200).

Almost surely, 2^80998992957 is an apocalyptic number.

It is an amenable number.

80998992957 is a deficient number, since it is larger than the sum of its proper divisors (27003312643).

80998992957 is a wasteful number, since it uses less digits than its factorization.

80998992957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912083.

The product of its (nonzero) digits is 264539520, while the sum is 75.

The spelling of 80998992957 in words is "eighty billion, nine hundred ninety-eight million, nine hundred ninety-two thousand, nine hundred fifty-seven".