21680629260715 has 16 divisors (see below), whose sum is σ = 26446419061920. Its totient is φ = 17058128728320.

The previous prime is 21680629260649. The next prime is 21680629260721. The reversal of 21680629260715 is 51706292608612.

It is not a de Polignac number, because 21680629260715 - 2²⁹ = 21680092389803 is a prime.

It is a super-2 number, since 2×21680629260715² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1687825 + ... + 6797794.

It is an arithmetic number, because the mean of its divisors is an integer number (1652901191370).

Almost surely, 2^{21680629260715} is an apocalyptic number.

21680629260715 is a deficient number, since it is larger than the sum of its proper divisors (4765789801205).

21680629260715 is an equidigital number, since it uses as much as digits as its factorization.

21680629260715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8494062.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 21680629260715 in words is "twenty-one trillion, six hundred eighty billion, six hundred twenty-nine million, two hundred sixty thousand, seven hundred fifteen".