40555413990 has 384 divisors, whose sum is σ = 139165326720. Its totient is φ = 8324176896.

The previous prime is 40555413971. The next prime is 40555414057. The reversal of 40555413990 is 9931455504.

40555413990 is a `hidden beast` number, since 4 + 0 + 5 + 554 + 1 + 3 + 9 + 90 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6360444 + ... + 6366816.

It is an arithmetic number, because the mean of its divisors is an integer number (362409705).

Almost surely, 2^40555413990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40555413990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69582663360).

40555413990 is an abundant number, since it is smaller than the sum of its proper divisors (98609912730).

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

40555413990 is a wasteful number, since it uses less digits than its factorization.

40555413990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453 (or 6440 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 40555413990 in words is "forty billion, five hundred fifty-five million, four hundred thirteen thousand, nine hundred ninety".