40786918521 has 16 divisors (see below), whose sum is σ = 54597959424. Its totient is φ = 27083661264.

The previous prime is 40786918481. The next prime is 40786918561. The reversal of 40786918521 is 12581968704.

It is an interprime number because it is at equal distance from previous prime (40786918481) and next prime (40786918561).

It is not a de Polignac number, because 40786918521 - 2²⁵ = 40753364089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40786918561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2289370 + ... + 2307116.

It is an arithmetic number, because the mean of its divisors is an integer number (3412372464).

Almost surely, 2^40786918521 is an apocalyptic number.

It is an amenable number.

40786918521 is a deficient number, since it is larger than the sum of its proper divisors (13811040903).

40786918521 is a wasteful number, since it uses less digits than its factorization.

40786918521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20740.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 40786918521 in words is "forty billion, seven hundred eighty-six million, nine hundred eighteen thousand, five hundred twenty-one".