80721471215 has 64 divisors (see below), whose sum is σ = 127288212480. Its totient is φ = 47609856000.

The previous prime is 80721471179. The next prime is 80721471221. The reversal of 80721471215 is 51217412708.

It is not a de Polignac number, because 80721471215 - 2³⁴ = 63541602031 is a prime.

It is a super-2 number, since 2×80721471215² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5998895 + ... + 6012335.

It is an arithmetic number, because the mean of its divisors is an integer number (1988878320).

Almost surely, 2^80721471215 is an apocalyptic number.

80721471215 is a deficient number, since it is larger than the sum of its proper divisors (46566741265).

80721471215 is a wasteful number, since it uses less digits than its factorization.

80721471215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14304.

The product of its (nonzero) digits is 31360, while the sum is 38.

The spelling of 80721471215 in words is "eighty billion, seven hundred twenty-one million, four hundred seventy-one thousand, two hundred fifteen".