15515610005560 has 32 divisors (see below), whose sum is σ = 39897282872160. Its totient is φ = 5319637716096.

The previous prime is 15515610005549. The next prime is 15515610005563. The reversal of 15515610005560 is 6550001651551.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15515610005563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27706446159 + ... + 27706446718.

It is an arithmetic number, because the mean of its divisors is an integer number (1246790089755).

Almost surely, 2^{15515610005560} is an apocalyptic number.

15515610005560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15515610005560 is an abundant number, since it is smaller than the sum of its proper divisors (24381672866600).

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

15515610005560 is a wasteful number, since it uses less digits than its factorization.

15515610005560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55412892895 (or 55412892891 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 15515610005560 in words is "fifteen trillion, five hundred fifteen billion, six hundred ten million, five thousand, five hundred sixty".