40255867636440 has 128 divisors (see below), whose sum is σ = 123535226511360. Its totient is φ = 10491410248704.

The previous prime is 40255867636349. The next prime is 40255867636463. The reversal of 40255867636440 is 4463676855204.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18691317 + ... + 20733476.

It is an arithmetic number, because the mean of its divisors is an integer number (965118957120).

Almost surely, 2^{40255867636440} is an apocalyptic number.

40255867636440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40255867636440 is an abundant number, since it is smaller than the sum of its proper divisors (83279358874920).

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

40255867636440 is a wasteful number, since it uses less digits than its factorization.

40255867636440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39425001 (or 39424997 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 60.

The spelling of 40255867636440 in words is "forty trillion, two hundred fifty-five billion, eight hundred sixty-seven million, six hundred thirty-six thousand, four hundred forty".