15540577152 has 32 divisors (see below), whose sum is σ = 41279659080. Its totient is φ = 5180192256.

The previous prime is 15540577133. The next prime is 15540577181. The reversal of 15540577152 is 25177504551.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×15540577152² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20234743 + ... + 20235510.

Almost surely, 2^15540577152 is an apocalyptic number.

15540577152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15540577152 is an abundant number, since it is smaller than the sum of its proper divisors (25739081928).

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

15540577152 is an equidigital number, since it uses as much as digits as its factorization.

15540577152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40470270 (or 40470258 counting only the distinct ones).

The product of its (nonzero) digits is 245000, while the sum is 42.

The spelling of 15540577152 in words is "fifteen billion, five hundred forty million, five hundred seventy-seven thousand, one hundred fifty-two".