15680978530660 has 12 divisors (see below), whose sum is σ = 32930054914428. Its totient is φ = 6272391412256.

The previous prime is 15680978530577. The next prime is 15680978530667. The reversal of 15680978530660 is 6603587908651.

It can be written as a sum of positive squares in 2 ways, for example, as 8773112259136 + 6907866271524 = 2961944^2 + 2628282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15680978530592 and 15680978530601.

It is not an unprimeable number, because it can be changed into a prime (15680978530667) 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 3 ways as a sum of consecutive naturals, for example, 392024463247 + ... + 392024463286.

It is an arithmetic number, because the mean of its divisors is an integer number (2744171242869).

Almost surely, 2^{15680978530660} is an apocalyptic number.

15680978530660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15680978530660 is an abundant number, since it is smaller than the sum of its proper divisors (17249076383768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15680978530660 is a wasteful number, since it uses less digits than its factorization.

15680978530660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784048926542 (or 784048926540 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 15680978530660 in words is "fifteen trillion, six hundred eighty billion, nine hundred seventy-eight million, five hundred thirty thousand, six hundred sixty".