43656485638131 has 12 divisors (see below), whose sum is σ = 63179940556408. Its totient is φ = 29048674953024.

The previous prime is 43656485638121. The next prime is 43656485638147. The reversal of 43656485638131 is 13183658465634.

43656485638131 is a `hidden beast` number, since 4 + 3 + 6 + 5 + 64 + 8 + 563 + 8 + 1 + 3 + 1 = 666.

It is not a de Polignac number, because 43656485638131 - 2²⁶ = 43656418529267 is a prime.

It is a super-2 number, since 2×43656485638131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43656485638121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4637395510 + ... + 4637404923.

Almost surely, 2^{43656485638131} is an apocalyptic number.

43656485638131 is a deficient number, since it is larger than the sum of its proper divisors (19523454918277).

43656485638131 is a wasteful number, since it uses less digits than its factorization.

43656485638131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274800962 (or 9274800959 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 63.

The spelling of 43656485638131 in words is "forty-three trillion, six hundred fifty-six billion, four hundred eighty-five million, six hundred thirty-eight thousand, one hundred thirty-one".