15487961980 has 12 divisors (see below), whose sum is σ = 32524720200. Its totient is φ = 6195184784.

The previous prime is 15487961971. The next prime is 15487961981. The reversal of 15487961980 is 8916978451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15487961981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387199030 + ... + 387199069.

It is an arithmetic number, because the mean of its divisors is an integer number (2710393350).

Almost surely, 2^15487961980 is an apocalyptic number.

15487961980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15487961980 is an abundant number, since it is smaller than the sum of its proper divisors (17036758220).

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

15487961980 is a wasteful number, since it uses less digits than its factorization.

15487961980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774398108 (or 774398106 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 15487961980 in words is "fifteen billion, four hundred eighty-seven million, nine hundred sixty-one thousand, nine hundred eighty".