40805752681 has 16 divisors (see below), whose sum is σ = 43856131968. Its totient is φ = 37828627200.

The previous prime is 40805752621. The next prime is 40805752717. The reversal of 40805752681 is 18625750804.

It is a cyclic number.

It is not a de Polignac number, because 40805752681 - 2²⁹ = 40268881769 is a prime.

It is a super-2 number, since 2×40805752681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40805752601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303786 + ... + 1334716.

It is an arithmetic number, because the mean of its divisors is an integer number (2741008248).

Almost surely, 2^40805752681 is an apocalyptic number.

It is an amenable number.

40805752681 is a deficient number, since it is larger than the sum of its proper divisors (3050379287).

40805752681 is a wasteful number, since it uses less digits than its factorization.

40805752681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32112.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 40805752681 in words is "forty billion, eight hundred five million, seven hundred fifty-two thousand, six hundred eighty-one".