40809740686 has 16 divisors (see below), whose sum is σ = 71916466608. Its totient is φ = 17122968000.

The previous prime is 40809740683. The next prime is 40809740687. The reversal of 40809740686 is 68604790804.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40809740681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71345415 + ... + 71345986.

It is an arithmetic number, because the mean of its divisors is an integer number (4494779163).

Almost surely, 2^40809740686 is an apocalyptic number.

40809740686 is a deficient number, since it is larger than the sum of its proper divisors (31106725922).

40809740686 is a wasteful number, since it uses less digits than its factorization.

40809740686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142691427.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 40809740686 in words is "forty billion, eight hundred nine million, seven hundred forty thousand, six hundred eighty-six".