12518391780 has 48 divisors (see below), whose sum is σ = 38946109440. Its totient is φ = 3338237664.

The previous prime is 12518391713. The next prime is 12518391793. The reversal of 12518391780 is 8719381521.

12518391780 is a `hidden beast` number, since 1 + 251 + 8 + 391 + 7 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 11590564 + ... + 11591643.

It is an arithmetic number, because the mean of its divisors is an integer number (811377280).

Almost surely, 2^12518391780 is an apocalyptic number.

12518391780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12518391780 is an abundant number, since it is smaller than the sum of its proper divisors (26427717660).

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

12518391780 is a wasteful number, since it uses less digits than its factorization.

12518391780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23182225 (or 23182217 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 12518391780 in words is "twelve billion, five hundred eighteen million, three hundred ninety-one thousand, seven hundred eighty".