12400131655 has 4 divisors (see below), whose sum is σ = 14880157992. Its totient is φ = 9920105320.

The previous prime is 12400131647. The next prime is 12400131661. The reversal of 12400131655 is 55613100421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55613100421 = 2593 ⋅21447397.

It is not a de Polignac number, because 12400131655 - 2³ = 12400131647 is a prime.

It is a super-2 number, since 2×12400131655² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240013161 + ... + 1240013170.

It is an arithmetic number, because the mean of its divisors is an integer number (3720039498).

Almost surely, 2^12400131655 is an apocalyptic number.

12400131655 is a deficient number, since it is larger than the sum of its proper divisors (2480026337).

12400131655 is an equidigital number, since it uses as much as digits as its factorization.

12400131655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480026336.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 12400131655 in words is "twelve billion, four hundred million, one hundred thirty-one thousand, six hundred fifty-five".