40899797640 has 512 divisors, whose sum is σ = 151545945600. Its totient is φ = 9747578880.

The previous prime is 40899797551. The next prime is 40899797671. The reversal of 40899797640 is 4679799804.

40899797640 is a `hidden beast` number, since 408 + 99 + 79 + 76 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 130670124 + ... + 130670436.

It is an arithmetic number, because the mean of its divisors is an integer number (295988175).

Almost surely, 2^40899797640 is an apocalyptic number.

40899797640 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 40899797640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75772972800).

40899797640 is an abundant number, since it is smaller than the sum of its proper divisors (110646147960).

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

40899797640 is a wasteful number, since it uses less digits than its factorization.

40899797640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 40899797640 in words is "forty billion, eight hundred ninety-nine million, seven hundred ninety-seven thousand, six hundred forty".