74212543631 has 16 divisors (see below), whose sum is σ = 82959233760. Its totient is φ = 65974487040.

The previous prime is 74212543627. The next prime is 74212543721. The reversal of 74212543631 is 13634521247.

It is a cyclic number.

It is not a de Polignac number, because 74212543631 - 2² = 74212543627 is a prime.

It is a super-2 number, since 2×74212543631² (a number of 23 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 (74212540631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232040 + ... + 449741.

It is an arithmetic number, because the mean of its divisors is an integer number (5184952110).

Almost surely, 2^74212543631 is an apocalyptic number.

74212543631 is a deficient number, since it is larger than the sum of its proper divisors (8746690129).

74212543631 is a wasteful number, since it uses less digits than its factorization.

74212543631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682154.

The product of its digits is 120960, while the sum is 38.

The spelling of 74212543631 in words is "seventy-four billion, two hundred twelve million, five hundred forty-three thousand, six hundred thirty-one".