40640003553520 has 240 divisors, whose sum is σ = 116700931376640. Its totient is φ = 12868315536384.

The previous prime is 40640003553473. The next prime is 40640003553521. The reversal of 40640003553520 is 2535530004604.

It is a self number, because there is not a number n which added to its sum of digits gives 40640003553520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640003553521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8956171 + ... + 12707989.

It is an arithmetic number, because the mean of its divisors is an integer number (486253880736).

Almost surely, 2^{40640003553520} is an apocalyptic number.

40640003553520 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 40640003553520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58350465688320).

40640003553520 is an abundant number, since it is smaller than the sum of its proper divisors (76060927823120).

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

40640003553520 is a wasteful number, since it uses less digits than its factorization.

40640003553520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751920 (or 3751885 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 37.

The spelling of 40640003553520 in words is "forty trillion, six hundred forty billion, three million, five hundred fifty-three thousand, five hundred twenty".