40604040613 has 2 divisors, whose sum is σ = 40604040614. Its totient is φ = 40604040612.

The previous prime is 40604040583. The next prime is 40604040637. The reversal of 40604040613 is 31604040604.

It is a happy number.

40604040613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21171123009 + 19432917604 = 145503^2 + 139402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40604040613 is a prime.

It is a super-2 number, since 2×40604040613² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40604040013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20302020306 + 20302020307.

It is an arithmetic number, because the mean of its divisors is an integer number (20302020307).

Almost surely, 2^40604040613 is an apocalyptic number.

It is an amenable number.

40604040613 is a deficient number, since it is larger than the sum of its proper divisors (1).

40604040613 is an equidigital number, since it uses as much as digits as its factorization.

40604040613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Subtracting from 40604040613 its reverse (31604040604), we obtain a palindrome (9000000009).

The spelling of 40604040613 in words is "forty billion, six hundred four million, forty thousand, six hundred thirteen".