13531661530 has 32 divisors (see below), whose sum is σ = 26911056384. Its totient is φ = 4872781056.

The previous prime is 13531661519. The next prime is 13531661569. The reversal of 13531661530 is 3516613531.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726482 + ... + 1734301.

It is an arithmetic number, because the mean of its divisors is an integer number (840970512).

Almost surely, 2^13531661530 is an apocalyptic number.

13531661530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13531661530 is a deficient number, since it is larger than the sum of its proper divisors (13379394854).

13531661530 is a wasteful number, since it uses less digits than its factorization.

13531661530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460830.

The product of its (nonzero) digits is 24300, while the sum is 34.

The spelling of 13531661530 in words is "thirteen billion, five hundred thirty-one million, six hundred sixty-one thousand, five hundred thirty".