40012423631 has 4 divisors (see below), whose sum is σ = 40668365064. Its totient is φ = 39356482200.

The previous prime is 40012423603. The next prime is 40012423637. The reversal of 40012423631 is 13632421004.

40012423631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40012423631 - 2¹⁴ = 40012407247 is a prime.

It is a super-2 number, since 2×40012423631² (a number of 22 digits) 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 40012423631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012423637) 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, 327970625 + ... + 327970746.

It is an arithmetic number, because the mean of its divisors is an integer number (10167091266).

Almost surely, 2^40012423631 is an apocalyptic number.

40012423631 is a deficient number, since it is larger than the sum of its proper divisors (655941433).

40012423631 is an equidigital number, since it uses as much as digits as its factorization.

40012423631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655941432.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 40012423631 its reverse (13632421004), we get a palindrome (53644844635).

The spelling of 40012423631 in words is "forty billion, twelve million, four hundred twenty-three thousand, six hundred thirty-one".