40765138655 has 8 divisors (see below), whose sum is σ = 49171629552. Its totient is φ = 32443135488.

The previous prime is 40765138651. The next prime is 40765138679. The reversal of 40765138655 is 55683156704.

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

It is a cyclic number.

It is not a de Polignac number, because 40765138655 - 2² = 40765138651 is a prime.

It is a super-2 number, since 2×40765138655² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40765138651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21120869 + ... + 21122798.

It is an arithmetic number, because the mean of its divisors is an integer number (6146453694).

Almost surely, 2^40765138655 is an apocalyptic number.

40765138655 is a deficient number, since it is larger than the sum of its proper divisors (8406490897).

40765138655 is a wasteful number, since it uses less digits than its factorization.

40765138655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42243865.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 40765138655 in words is "forty billion, seven hundred sixty-five million, one hundred thirty-eight thousand, six hundred fifty-five".