40615410681 has 18 divisors (see below), whose sum is σ = 59333391390. Its totient is φ = 26772658176.

The previous prime is 40615410677. The next prime is 40615410691. The reversal of 40615410681 is 18601451604.

It can be written as a sum of positive squares in 3 ways, for example, as 5239443456 + 35375967225 = 72384^2 + 188085^2 .

It is not a de Polignac number, because 40615410681 - 2² = 40615410677 is a prime.

It is a super-2 number, since 2×40615410681² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40615410601) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 213576 + ... + 356153.

Almost surely, 2^40615410681 is an apocalyptic number.

It is an amenable number.

40615410681 is a deficient number, since it is larger than the sum of its proper divisors (18717980709).

40615410681 is an equidigital number, since it uses as much as digits as its factorization.

40615410681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569913 (or 569821 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 40615410681 in words is "forty billion, six hundred fifteen million, four hundred ten thousand, six hundred eighty-one".