63540631 has 8 divisors (see below), whose sum is σ = 79219584. Its totient is φ = 49512120.

The previous prime is 63540629. The next prime is 63540637. The reversal of 63540631 is 13604536.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63540631 - 2¹ = 63540629 is a prime.

It is a super-2 number, since 2×63540631² = 8074823575756322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63540631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63540637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412525 + ... + 412678.

It is an arithmetic number, because the mean of its divisors is an integer number (9902448).

Almost surely, 2^63540631 is an apocalyptic number.

63540631 is a deficient number, since it is larger than the sum of its proper divisors (15678953).

63540631 is a wasteful number, since it uses less digits than its factorization.

63540631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825221.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 63540631 is about 7971.2377332507. The cubic root of 63540631 is about 399.0406823635.

The spelling of 63540631 in words is "sixty-three million, five hundred forty thousand, six hundred thirty-one".