65656563125 has 20 divisors (see below), whose sum is σ = 82634798400. Its totient is φ = 52147302000.

The previous prime is 65656563109. The next prime is 65656563127. The reversal of 65656563125 is 52136565656.

It is not a de Polignac number, because 65656563125 - 2⁴ = 65656563109 is a prime.

It is a super-4 number, since 4×65656563125⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65656563127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 291005 + ... + 464754.

It is an arithmetic number, because the mean of its divisors is an integer number (4131739920).

Almost surely, 2^65656563125 is an apocalyptic number.

It is an amenable number.

65656563125 is a deficient number, since it is larger than the sum of its proper divisors (16978235275).

65656563125 is an equidigital number, since it uses as much as digits as its factorization.

65656563125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755918 (or 755903 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 50.

It can be divided in two parts, 656565631 and 25, that added together give a palindrome (656565656).

The spelling of 65656563125 in words is "sixty-five billion, six hundred fifty-six million, five hundred sixty-three thousand, one hundred twenty-five".