40685308131 has 16 divisors (see below), whose sum is σ = 58488465056. Its totient is φ = 25007740416.

The previous prime is 40685308099. The next prime is 40685308187. The reversal of 40685308131 is 13180358604.

It is not a de Polignac number, because 40685308131 - 2⁵ = 40685308099 is a prime.

It is a super-2 number, since 2×40685308131² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40685308131.

It is not an unprimeable number, because it can be changed into a prime (40685308031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578230 + ... + 644763.

It is an arithmetic number, because the mean of its divisors is an integer number (3655529066).

Almost surely, 2^40685308131 is an apocalyptic number.

40685308131 is a deficient number, since it is larger than the sum of its proper divisors (17803156925).

40685308131 is a wasteful number, since it uses less digits than its factorization.

40685308131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223862.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 40685308131 in words is "forty billion, six hundred eighty-five million, three hundred eight thousand, one hundred thirty-one".