13187457540 has 72 divisors (see below), whose sum is σ = 40015481688. Its totient is φ = 3515466240.

The previous prime is 13187457533. The next prime is 13187457599. The reversal of 13187457540 is 4575478131.

13187457540 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 74 + 575 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4130889984 + 9056567556 = 64272^2 + 95166^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 607270 + ... + 628610.

It is an arithmetic number, because the mean of its divisors is an integer number (555770579).

Almost surely, 2^13187457540 is an apocalyptic number.

13187457540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13187457540 is an abundant number, since it is smaller than the sum of its proper divisors (26828024148).

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

13187457540 is a wasteful number, since it uses less digits than its factorization.

13187457540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24789 (or 24784 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 13187457540 in words is "thirteen billion, one hundred eighty-seven million, four hundred fifty-seven thousand, five hundred forty".