131397709597455 has 64 divisors (see below), whose sum is σ = 240543677491200. Its totient is φ = 59999161259520.

The previous prime is 131397709597433. The next prime is 131397709597621. The reversal of 131397709597455 is 554795907793131.

It is a Cunningham number, because it is equal to 11462884²-1.

It is not a de Polignac number, because 131397709597455 - 2⁸ = 131397709597199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 401037150 + ... + 401364660.

It is an arithmetic number, because the mean of its divisors is an integer number (3758494960800).

Almost surely, 2^{131397709597455} is an apocalyptic number.

131397709597455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131397709597455 is a deficient number, since it is larger than the sum of its proper divisors (109145967893745).

131397709597455 is a wasteful number, since it uses less digits than its factorization.

131397709597455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331864.

The product of its (nonzero) digits is 1125211500, while the sum is 75.

The spelling of 131397709597455 in words is "one hundred thirty-one trillion, three hundred ninety-seven billion, seven hundred nine million, five hundred ninety-seven thousand, four hundred fifty-five".