40373665920 has 1280 divisors, whose sum is σ = 176492574720. Its totient is φ = 8599633920.

The previous prime is 40373665903. The next prime is 40373665979. The reversal of 40373665920 is 2956637304.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 416223312 + ... + 416223408.

It is an arithmetic number, because the mean of its divisors is an integer number (137884824).

Almost surely, 2^40373665920 is an apocalyptic number.

40373665920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40373665920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88246287360).

40373665920 is an abundant number, since it is smaller than the sum of its proper divisors (136118908800).

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

40373665920 is a wasteful number, since it uses less digits than its factorization.

40373665920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 40373665920 in words is "forty billion, three hundred seventy-three million, six hundred sixty-five thousand, nine hundred twenty".