80815419721 has 16 divisors (see below), whose sum is σ = 83886580800. Its totient is φ = 77793110208.

The previous prime is 80815419709. The next prime is 80815419761. The reversal of 80815419721 is 12791451808.

It is a cyclic number.

It is not a de Polignac number, because 80815419721 - 2¹⁷ = 80815288649 is a prime.

It is a super-2 number, since 2×80815419721² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80815419701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2739870 + ... + 2769208.

It is an arithmetic number, because the mean of its divisors is an integer number (5242911300).

Almost surely, 2^80815419721 is an apocalyptic number.

It is an amenable number.

80815419721 is a deficient number, since it is larger than the sum of its proper divisors (3071161079).

80815419721 is a wasteful number, since it uses less digits than its factorization.

80815419721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30168.

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 80815419721 in words is "eighty billion, eight hundred fifteen million, four hundred nineteen thousand, seven hundred twenty-one".