40153787891 has 64 divisors (see below), whose sum is σ = 50585472000. Its totient is φ = 31743871488.

The previous prime is 40153787879. The next prime is 40153787909. The reversal of 40153787891 is 19878735104.

It is a de Polignac number, because none of the positive numbers 2^k-40153787891 is a prime.

It is a super-2 number, since 2×40153787891² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40153787801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78887345 + ... + 78887853.

It is an arithmetic number, because the mean of its divisors is an integer number (790398000).

Almost surely, 2^40153787891 is an apocalyptic number.

40153787891 is a deficient number, since it is larger than the sum of its proper divisors (10431684109).

40153787891 is a wasteful number, since it uses less digits than its factorization.

40153787891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 40153787891 in words is "forty billion, one hundred fifty-three million, seven hundred eighty-seven thousand, eight hundred ninety-one".