40644431454 has 32 divisors (see below), whose sum is σ = 88692954624. Its totient is φ = 12314522880.

The previous prime is 40644431447. The next prime is 40644431459. The reversal of 40644431454 is 45413444604.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40644431459) 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, 396462 + ... + 488334.

It is an arithmetic number, because the mean of its divisors is an integer number (2771654832).

Almost surely, 2^40644431454 is an apocalyptic number.

40644431454 is an abundant number, since it is smaller than the sum of its proper divisors (48048523170).

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

40644431454 is a wasteful number, since it uses less digits than its factorization.

40644431454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98592.

The product of its (nonzero) digits is 368640, while the sum is 39.

The spelling of 40644431454 in words is "forty billion, six hundred forty-four million, four hundred thirty-one thousand, four hundred fifty-four".