131855187961 has 16 divisors (see below), whose sum is σ = 151052848128. Its totient is φ = 112748000400.

The previous prime is 131855187901. The next prime is 131855187967. The reversal of 131855187961 is 169781558131.

It is not a de Polignac number, because 131855187961 - 2⁷ = 131855187833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131855187967) 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, 13272166 + ... + 13282096.

It is an arithmetic number, because the mean of its divisors is an integer number (9440803008).

Almost surely, 2^131855187961 is an apocalyptic number.

It is an amenable number.

131855187961 is a deficient number, since it is larger than the sum of its proper divisors (19197660167).

131855187961 is an equidigital number, since it uses as much as digits as its factorization.

131855187961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14292.

The product of its digits is 1814400, while the sum is 55.

The spelling of 131855187961 in words is "one hundred thirty-one billion, eight hundred fifty-five million, one hundred eighty-seven thousand, nine hundred sixty-one".