15434999980 has 24 divisors (see below), whose sum is σ = 34119474480. Its totient is φ = 5849052480.

The previous prime is 15434999977. The next prime is 15435000017. The reversal of 15434999980 is 8999943451.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20308831 + ... + 20309590.

It is an arithmetic number, because the mean of its divisors is an integer number (1421644770).

Almost surely, 2^15434999980 is an apocalyptic number.

15434999980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15434999980 is an abundant number, since it is smaller than the sum of its proper divisors (18684474500).

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

15434999980 is a wasteful number, since it uses less digits than its factorization.

15434999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40618449 (or 40618447 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 15434999980 in words is "fifteen billion, four hundred thirty-four million, nine hundred ninety-nine thousand, nine hundred eighty".