12515514510 has 32 divisors (see below), whose sum is σ = 31618143360. Its totient is φ = 3161814048.

The previous prime is 12515514503. The next prime is 12515514527. The reversal of 12515514510 is 1541551521.

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

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, 10977952 + ... + 10979091.

It is an arithmetic number, because the mean of its divisors is an integer number (988066980).

Almost surely, 2^12515514510 is an apocalyptic number.

12515514510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12515514510 is an abundant number, since it is smaller than the sum of its proper divisors (19102628850).

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

12515514510 is a wasteful number, since it uses less digits than its factorization.

12515514510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21957072.

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 12515514510 in words is "twelve billion, five hundred fifteen million, five hundred fourteen thousand, five hundred ten".