40001945616 has 60 divisors (see below), whose sum is σ = 113298717168. Its totient is φ = 13173327552.

The previous prime is 40001945611. The next prime is 40001945617. The reversal of 40001945616 is 61654910004.

40001945616 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 1 + 94 + 561 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (40001945611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1661490 + ... + 1685393.

Almost surely, 2^40001945616 is an apocalyptic number.

It is an amenable number.

40001945616 is an abundant number, since it is smaller than the sum of its proper divisors (73296771552).

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

40001945616 is a wasteful number, since it uses less digits than its factorization.

40001945616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346980 (or 3346971 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 40001945616 in words is "forty billion, one million, nine hundred forty-five thousand, six hundred sixteen".