40154256440 has 32 divisors (see below), whose sum is σ = 92051743680. Its totient is φ = 15758650752.

The previous prime is 40154256427. The next prime is 40154256449. The reversal of 40154256440 is 4465245104.

It is a super-2 number, since 2×40154256440² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40154256440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40154256449) 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, 9468224 + ... + 9472463.

It is an arithmetic number, because the mean of its divisors is an integer number (2876616990).

Almost surely, 2^40154256440 is an apocalyptic number.

40154256440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40154256440 is an abundant number, since it is smaller than the sum of its proper divisors (51897487240).

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

40154256440 is a wasteful number, since it uses less digits than its factorization.

40154256440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18940751 (or 18940747 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 40154256440 in words is "forty billion, one hundred fifty-four million, two hundred fifty-six thousand, four hundred forty".