80621515357 has 16 divisors (see below), whose sum is σ = 81517363200. Its totient is φ = 79731788400.

The previous prime is 80621515349. The next prime is 80621515379. The reversal of 80621515357 is 75351512608.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80621515357 - 2³ = 80621515349 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 (80621515057) by changing a digit.

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, 43089132 + ... + 43091002.

It is an arithmetic number, because the mean of its divisors is an integer number (5094835200).

Almost surely, 2^80621515357 is an apocalyptic number.

It is an amenable number.

80621515357 is a deficient number, since it is larger than the sum of its proper divisors (895847843).

80621515357 is a wasteful number, since it uses less digits than its factorization.

80621515357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 80621515357 in words is "eighty billion, six hundred twenty-one million, five hundred fifteen thousand, three hundred fifty-seven".