40748749269921 has 80 divisors (see below), whose sum is σ = 76030598814720. Its totient is φ = 21129480983520.

The previous prime is 40748749269919. The next prime is 40748749269961. The reversal of 40748749269921 is 12996294784704.

40748749269921 is a `hidden beast` number, since 4 + 0 + 7 + 48 + 7 + 492 + 6 + 9 + 92 + 1 = 666.

It is not a de Polignac number, because 40748749269921 - 2¹ = 40748749269919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40748749269921.

It is not an unprimeable number, because it can be changed into a prime (40748749269911) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2560381 + ... + 9383658.

It is an arithmetic number, because the mean of its divisors is an integer number (950382485184).

Almost surely, 2^{40748749269921} is an apocalyptic number.

It is an amenable number.

40748749269921 is a deficient number, since it is larger than the sum of its proper divisors (35281849544799).

40748749269921 is a wasteful number, since it uses less digits than its factorization.

40748749269921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11944616 (or 11944607 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 72.

The spelling of 40748749269921 in words is "forty trillion, seven hundred forty-eight billion, seven hundred forty-nine million, two hundred sixty-nine thousand, nine hundred twenty-one".