8125632663565 has 4 divisors (see below), whose sum is σ = 9750759196284. Its totient is φ = 6500506130848.

The previous prime is 8125632663529. The next prime is 8125632663569. The reversal of 8125632663565 is 5653662365218.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1501953193764 + 6623679469801 = 1225542^2 + 2573651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8125632663565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8125632663569) 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, 812563266352 + ... + 812563266361.

It is an arithmetic number, because the mean of its divisors is an integer number (2437689799071).

Almost surely, 2^{8125632663565} is an apocalyptic number.

It is an amenable number.

8125632663565 is a deficient number, since it is larger than the sum of its proper divisors (1625126532719).

8125632663565 is a wasteful number, since it uses less digits than its factorization.

8125632663565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625126532718.

The product of its digits is 46656000, while the sum is 58.

The spelling of 8125632663565 in words is "eight trillion, one hundred twenty-five billion, six hundred thirty-two million, six hundred sixty-three thousand, five hundred sixty-five".