80902992721 has 8 divisors (see below), whose sum is σ = 82869757344. Its totient is φ = 78940105440.

The previous prime is 80902992661. The next prime is 80902992739. The reversal of 80902992721 is 12729920908.

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

It is a cyclic number.

It is not a de Polignac number, because 80902992721 - 2⁷ = 80902992593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80902995721) 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, 927076 + ... + 1010581.

It is an arithmetic number, because the mean of its divisors is an integer number (10358719668).

Almost surely, 2^80902992721 is an apocalyptic number.

It is an amenable number.

80902992721 is a deficient number, since it is larger than the sum of its proper divisors (1966764623).

80902992721 is a wasteful number, since it uses less digits than its factorization.

80902992721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938671.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 80902992721 in words is "eighty billion, nine hundred two million, nine hundred ninety-two thousand, seven hundred twenty-one".