12515661120 has 112 divisors (see below), whose sum is σ = 42074762688. Its totient is φ = 3141181440.

The previous prime is 12515661101. The next prime is 12515661121. The reversal of 12515661120 is 2116651521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515661121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367126 + ... + 399765.

It is an arithmetic number, because the mean of its divisors is an integer number (375667524).

Almost surely, 2^12515661120 is an apocalyptic number.

12515661120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12515661120 is an abundant number, since it is smaller than the sum of its proper divisors (29559101568).

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

12515661120 is a wasteful number, since it uses less digits than its factorization.

12515661120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766928 (or 766918 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 12515661120 in words is "twelve billion, five hundred fifteen million, six hundred sixty-one thousand, one hundred twenty".