40806815766 has 12 divisors (see below), whose sum is σ = 81614621172. Its totient is φ = 13602106984.

The previous prime is 40806815737. The next prime is 40806815771. The reversal of 40806815766 is 66751860804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 453580 + ... + 536048.

It is an arithmetic number, because the mean of its divisors is an integer number (6801218431).

Almost surely, 2^40806815766 is an apocalyptic number.

40806815766 is an abundant number, since it is smaller than the sum of its proper divisors (40807805406).

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

40806815766 is an frugal number, since it uses more digits than its factorization.

40806815766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164943 (or 82474 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 40806815766 in words is "forty billion, eight hundred six million, eight hundred fifteen thousand, seven hundred sixty-six".