15540505158 has 32 divisors (see below), whose sum is σ = 32094074880. Its totient is φ = 5011433280.

The previous prime is 15540505147. The next prime is 15540505163. The reversal of 15540505158 is 85150504551.

It is a congruent number.

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, 644178 + ... + 667866.

It is an arithmetic number, because the mean of its divisors is an integer number (1002939840).

Almost surely, 2^15540505158 is an apocalyptic number.

15540505158 is an abundant number, since it is smaller than the sum of its proper divisors (16553569722).

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

15540505158 is a wasteful number, since it uses less digits than its factorization.

15540505158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27252.

The product of its (nonzero) digits is 100000, while the sum is 39.

The spelling of 15540505158 in words is "fifteen billion, five hundred forty million, five hundred five thousand, one hundred fifty-eight".