15604463980 has 48 divisors (see below), whose sum is σ = 37794335040. Its totient is φ = 5301013248.

The previous prime is 15604463977. The next prime is 15604463981. The reversal of 15604463980 is 8936440651.

It is a super-2 number, since 2×15604463980² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 15604463980.

It is not an unprimeable number, because it can be changed into a prime (15604463981) 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, 496027 + ... + 526546.

It is an arithmetic number, because the mean of its divisors is an integer number (787381980).

Almost surely, 2^15604463980 is an apocalyptic number.

15604463980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15604463980 is an abundant number, since it is smaller than the sum of its proper divisors (22189871060).

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

15604463980 is a wasteful number, since it uses less digits than its factorization.

15604463980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022698 (or 1022696 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 15604463980 in words is "fifteen billion, six hundred four million, four hundred sixty-three thousand, nine hundred eighty".