65656236131 has 4 divisors (see below), whose sum is σ = 67774179264. Its totient is φ = 63538293000.

The previous prime is 65656236119. The next prime is 65656236167. The reversal of 65656236131 is 13163265656.

65656236131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65656236131 - 2⁶ = 65656236067 is a prime.

It is a super-2 number, since 2×65656236131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65656236181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058971520 + ... + 1058971581.

It is an arithmetic number, because the mean of its divisors is an integer number (16943544816).

Almost surely, 2^65656236131 is an apocalyptic number.

65656236131 is a deficient number, since it is larger than the sum of its proper divisors (2117943133).

65656236131 is a wasteful number, since it uses less digits than its factorization.

65656236131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117943132.

The product of its digits is 583200, while the sum is 44.

The spelling of 65656236131 in words is "sixty-five billion, six hundred fifty-six million, two hundred thirty-six thousand, one hundred thirty-one".