12566991078740 has 96 divisors (see below), whose sum is σ = 30221928038400. Its totient is φ = 4299955528320.

The previous prime is 12566991078731. The next prime is 12566991078749. The reversal of 12566991078740 is 4787019966521.

12566991078740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12566991078731) and next prime (12566991078749).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566991078749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145174391 + ... + 145260929.

It is an arithmetic number, because the mean of its divisors is an integer number (314811750400).

Almost surely, 2^{12566991078740} is an apocalyptic number.

12566991078740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12566991078740 is an abundant number, since it is smaller than the sum of its proper divisors (17654936959660).

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

12566991078740 is a wasteful number, since it uses less digits than its factorization.

12566991078740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88645 (or 88643 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 65.

The spelling of 12566991078740 in words is "twelve trillion, five hundred sixty-six billion, nine hundred ninety-one million, seventy-eight thousand, seven hundred forty".