131625116466661 has 4 divisors (see below), whose sum is σ = 131643805259232. Its totient is φ = 131606427674092.

The previous prime is 131625116466653. The next prime is 131625116466691. The reversal of 131625116466661 is 166664611526131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131625116466661 - 2³ = 131625116466653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131625116466691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9344385721 + ... + 9344399806.

It is an arithmetic number, because the mean of its divisors is an integer number (32910951314808).

Almost surely, 2^{131625116466661} is an apocalyptic number.

It is an amenable number.

131625116466661 is a deficient number, since it is larger than the sum of its proper divisors (18688792571).

131625116466661 is an equidigital number, since it uses as much as digits as its factorization.

131625116466661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18688792570.

The product of its digits is 5598720, while the sum is 55.

The spelling of 131625116466661 in words is "one hundred thirty-one trillion, six hundred twenty-five billion, one hundred sixteen million, four hundred sixty-six thousand, six hundred sixty-one".