40408764681 has 8 divisors (see below), whose sum is σ = 54149099200. Its totient is φ = 26803803312.

The previous prime is 40408764667. The next prime is 40408764727. The reversal of 40408764681 is 18646780404.

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

It is not a de Polignac number, because 40408764681 - 2¹¹ = 40408762633 is a prime.

It is a super-2 number, since 2×40408764681² (a number of 22 digits) 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 40408764681.

It is not an unprimeable number, because it can be changed into a prime (40408764611) 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, 33842590 + ... + 33843783.

It is an arithmetic number, because the mean of its divisors is an integer number (6768637400).

Almost surely, 2^40408764681 is an apocalyptic number.

It is an amenable number.

40408764681 is a deficient number, since it is larger than the sum of its proper divisors (13740334519).

40408764681 is a wasteful number, since it uses less digits than its factorization.

40408764681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67686575.

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 40408764681 in words is "forty billion, four hundred eight million, seven hundred sixty-four thousand, six hundred eighty-one".