12561818710 has 32 divisors (see below), whose sum is σ = 25848006912. Its totient is φ = 4305817440.

The previous prime is 12561818699. The next prime is 12561818719. The reversal of 12561818710 is 1781816521.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561818719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284845 + ... + 325975.

It is an arithmetic number, because the mean of its divisors is an integer number (807750216).

Almost surely, 2^12561818710 is an apocalyptic number.

12561818710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12561818710 is an abundant number, since it is smaller than the sum of its proper divisors (13286188202).

12561818710 is a wasteful number, since it uses less digits than its factorization.

12561818710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45508.

The product of its (nonzero) digits is 26880, while the sum is 40.

The spelling of 12561818710 in words is "twelve billion, five hundred sixty-one million, eight hundred eighteen thousand, seven hundred ten".