63631235540365 has 4 divisors (see below), whose sum is σ = 76357482648444. Its totient is φ = 50904988432288.

The previous prime is 63631235540357. The next prime is 63631235540479. The reversal of 63631235540365 is 56304553213636.

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 41502688138564 + 22128547401801 = 6442258^2 + 4704099^2 .

It is a cyclic number.

It is not a de Polignac number, because 63631235540365 - 2³ = 63631235540357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6363123554032 + ... + 6363123554041.

It is an arithmetic number, because the mean of its divisors is an integer number (19089370662111).

Almost surely, 2^{63631235540365} is an apocalyptic number.

It is an amenable number.

63631235540365 is a deficient number, since it is larger than the sum of its proper divisors (12726247108079).

63631235540365 is a wasteful number, since it uses less digits than its factorization.

63631235540365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12726247108078.

The product of its (nonzero) digits is 17496000, while the sum is 52.

The spelling of 63631235540365 in words is "sixty-three trillion, six hundred thirty-one billion, two hundred thirty-five million, five hundred forty thousand, three hundred sixty-five".