13151661540 has 24 divisors (see below), whose sum is σ = 36824652480. Its totient is φ = 3507109728.

The previous prime is 13151661539. The next prime is 13151661563. The reversal of 13151661540 is 4516615131.

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, 109597120 + ... + 109597239.

It is an arithmetic number, because the mean of its divisors is an integer number (1534360520).

Almost surely, 2^13151661540 is an apocalyptic number.

13151661540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13151661540 is an abundant number, since it is smaller than the sum of its proper divisors (23672990940).

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

13151661540 is a wasteful number, since it uses less digits than its factorization.

13151661540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219194371 (or 219194369 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 13151661540 in words is "thirteen billion, one hundred fifty-one million, six hundred sixty-one thousand, five hundred forty".