40423644657012 has 24 divisors (see below), whose sum is σ = 96871076386336. Its totient is φ = 13110371239968.

The previous prime is 40423644656999. The next prime is 40423644657017. The reversal of 40423644657012 is 21075644632404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423644657017) 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, 45522121918 + ... + 45522122805.

Almost surely, 2^{40423644657012} is an apocalyptic number.

It is an amenable number.

40423644657012 is an abundant number, since it is smaller than the sum of its proper divisors (56447431729324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40423644657012 is a wasteful number, since it uses less digits than its factorization.

40423644657012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91044244767 (or 91044244765 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 48.

The spelling of 40423644657012 in words is "forty trillion, four hundred twenty-three billion, six hundred forty-four million, six hundred fifty-seven thousand, twelve".