80421000761 has 4 divisors (see below), whose sum is σ = 83015226624. Its totient is φ = 77826774900.

The previous prime is 80421000703. The next prime is 80421000763. The reversal of 80421000761 is 16700012408.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80421000761 - 2²⁶ = 80353891897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80421000763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297112885 + ... + 1297112946.

It is an arithmetic number, because the mean of its divisors is an integer number (20753806656).

Almost surely, 2^80421000761 is an apocalyptic number.

80421000761 is the 126824-th centered decagonal number.

It is an amenable number.

80421000761 is a deficient number, since it is larger than the sum of its proper divisors (2594225863).

80421000761 is a wasteful number, since it uses less digits than its factorization.

80421000761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594225862.

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 80421000761 in words is "eighty billion, four hundred twenty-one million, seven hundred sixty-one", and thus it is an aban number.