131646618425 has 24 divisors (see below), whose sum is σ = 187158187776. Its totient is φ = 89983520640.

The previous prime is 131646618421. The next prime is 131646618431. The reversal of 131646618425 is 524816646131.

It is not a de Polignac number, because 131646618425 - 2² = 131646618421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131646618425.

It is not an unprimeable number, because it can be changed into a prime (131646618421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1146929 + ... + 1256478.

It is an arithmetic number, because the mean of its divisors is an integer number (7798257824).

Almost surely, 2^131646618425 is an apocalyptic number.

It is an amenable number.

131646618425 is a deficient number, since it is larger than the sum of its proper divisors (55511569351).

131646618425 is a wasteful number, since it uses less digits than its factorization.

131646618425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403737 (or 2403732 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The spelling of 131646618425 in words is "one hundred thirty-one billion, six hundred forty-six million, six hundred eighteen thousand, four hundred twenty-five".