64212543631 has 8 divisors (see below), whose sum is σ = 65435202000. Its totient is φ = 62990296512.

The previous prime is 64212543607. The next prime is 64212543673. The reversal of 64212543631 is 13634521246.

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

It is a cyclic number.

It is not a de Polignac number, because 64212543631 - 2⁹ = 64212543119 is a prime.

It is a super-2 number, since 2×64212543631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64212543691) 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, 222120 + ... + 421618.

It is an arithmetic number, because the mean of its divisors is an integer number (8179400250).

Almost surely, 2^64212543631 is an apocalyptic number.

64212543631 is a deficient number, since it is larger than the sum of its proper divisors (1222658369).

64212543631 is a wasteful number, since it uses less digits than its factorization.

64212543631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205625.

The product of its digits is 103680, while the sum is 37.

The spelling of 64212543631 in words is "sixty-four billion, two hundred twelve million, five hundred forty-three thousand, six hundred thirty-one".