40765681 has 8 divisors (see below), whose sum is σ = 45136224. Its totient is φ = 36505920.

The previous prime is 40765679. The next prime is 40765691. The reversal of 40765681 is 18656704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40765681 - 2¹ = 40765679 is a prime.

It is a super-2 number, since 2×40765681² = 3323681494787522, which contains 22 as substring.

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 40765681.

It is not an unprimeable number, because it can be changed into a prime (40765631) 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, 26920 + ... + 28393.

It is an arithmetic number, because the mean of its divisors is an integer number (5642028).

Almost surely, 2^40765681 is an apocalyptic number.

It is an amenable number.

40765681 is a deficient number, since it is larger than the sum of its proper divisors (4370543).

40765681 is a wasteful number, since it uses less digits than its factorization.

40765681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55391.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 40765681 is about 6384.8007799774. The cubic root of 40765681 is about 344.1635720424.

The spelling of 40765681 in words is "forty million, seven hundred sixty-five thousand, six hundred eighty-one".