15980561400 has 96 divisors (see below), whose sum is σ = 50218504560. Its totient is φ = 4203095040.

The previous prime is 15980561383. The next prime is 15980561417. The reversal of 15980561400 is 416508951.

It is an interprime number because it is at equal distance from previous prime (15980561383) and next prime (15980561417).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138627 + ... + 226226.

Almost surely, 2^15980561400 is an apocalyptic number.

15980561400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15980561400 is an abundant number, since it is smaller than the sum of its proper divisors (34237943160).

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

15980561400 is a wasteful number, since it uses less digits than its factorization.

15980561400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364945 (or 364936 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 15980561400 in words is "fifteen billion, nine hundred eighty million, five hundred sixty-one thousand, four hundred".