131964378645 has 32 divisors (see below), whose sum is σ = 231750987264. Its totient is φ = 63590184000.

The previous prime is 131964378587. The next prime is 131964378697. The reversal of 131964378645 is 546873469131.

It is not a de Polignac number, because 131964378645 - 2⁸ = 131964378389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2426431 + ... + 2480220.

It is an arithmetic number, because the mean of its divisors is an integer number (7242218352).

Almost surely, 2^131964378645 is an apocalyptic number.

131964378645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131964378645 is a deficient number, since it is larger than the sum of its proper divisors (99786608619).

131964378645 is a wasteful number, since it uses less digits than its factorization.

131964378645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906833.

The product of its digits is 13063680, while the sum is 57.

The spelling of 131964378645 in words is "one hundred thirty-one billion, nine hundred sixty-four million, three hundred seventy-eight thousand, six hundred forty-five".