15531332545 has 32 divisors (see below), whose sum is σ = 19830643200. Its totient is φ = 11644528896.

The previous prime is 15531332489. The next prime is 15531332603. The reversal of 15531332545 is 54523313551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15531332545 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3562507 + ... + 3566863.

It is an arithmetic number, because the mean of its divisors is an integer number (619707600).

Almost surely, 2^15531332545 is an apocalyptic number.

It is an amenable number.

15531332545 is a deficient number, since it is larger than the sum of its proper divisors (4299310655).

15531332545 is a wasteful number, since it uses less digits than its factorization.

15531332545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777.

The product of its digits is 135000, while the sum is 37.

The spelling of 15531332545 in words is "fifteen billion, five hundred thirty-one million, three hundred thirty-two thousand, five hundred forty-five".