63655611633431 has 4 divisors (see below), whose sum is σ = 67400059376592. Its totient is φ = 59911163890272.

The previous prime is 63655611633347. The next prime is 63655611633433. The reversal of 63655611633431 is 13433611655636.

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 63655611633431 - 2²⁶ = 63655544524567 is a prime.

It is a super-4 number, since 4×63655611633431⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63655611633433) 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, 1872223871555 + ... + 1872223871588.

It is an arithmetic number, because the mean of its divisors is an integer number (16850014844148).

Almost surely, 2^{63655611633431} is an apocalyptic number.

63655611633431 is a deficient number, since it is larger than the sum of its proper divisors (3744447743161).

63655611633431 is a wasteful number, since it uses less digits than its factorization.

63655611633431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744447743160.

The product of its digits is 10497600, while the sum is 53.

The spelling of 63655611633431 in words is "sixty-three trillion, six hundred fifty-five billion, six hundred eleven million, six hundred thirty-three thousand, four hundred thirty-one".