63654503631 has 4 divisors (see below), whose sum is σ = 84872671512. Its totient is φ = 42436335752.

The previous prime is 63654503617. The next prime is 63654503641. The reversal of 63654503631 is 13630545636.

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 63654503631 - 2⁹ = 63654503119 is a prime.

It is a super-2 number, since 2×63654503631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63654503641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10609083936 + ... + 10609083941.

It is an arithmetic number, because the mean of its divisors is an integer number (21218167878).

Almost surely, 2^63654503631 is an apocalyptic number.

63654503631 is a deficient number, since it is larger than the sum of its proper divisors (21218167881).

63654503631 is a wasteful number, since it uses less digits than its factorization.

63654503631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21218167880.

The product of its (nonzero) digits is 583200, while the sum is 42.

The spelling of 63654503631 in words is "sixty-three billion, six hundred fifty-four million, five hundred three thousand, six hundred thirty-one".