15531545465 has 32 divisors (see below), whose sum is σ = 19071714816. Its totient is φ = 12140513280.

The previous prime is 15531545461. The next prime is 15531545479. The reversal of 15531545465 is 56454513551.

It is not a de Polignac number, because 15531545465 - 2² = 15531545461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15531545461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12616400 + ... + 12617630.

It is an arithmetic number, because the mean of its divisors is an integer number (595991088).

Almost surely, 2^15531545465 is an apocalyptic number.

It is an amenable number.

15531545465 is a deficient number, since it is larger than the sum of its proper divisors (3540169351).

15531545465 is a wasteful number, since it uses less digits than its factorization.

15531545465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649.

The product of its digits is 900000, while the sum is 44.

The spelling of 15531545465 in words is "fifteen billion, five hundred thirty-one million, five hundred forty-five thousand, four hundred sixty-five".