40136965679 has 2 divisors, whose sum is σ = 40136965680. Its totient is φ = 40136965678.

The previous prime is 40136965669. The next prime is 40136965721. The reversal of 40136965679 is 97656963104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40136965679 - 2¹² = 40136961583 is a prime.

It is a super-2 number, since 2×40136965679² (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 (40136965619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20068482839 + 20068482840.

It is an arithmetic number, because the mean of its divisors is an integer number (20068482840).

Almost surely, 2^40136965679 is an apocalyptic number.

40136965679 is a deficient number, since it is larger than the sum of its proper divisors (1).

40136965679 is an equidigital number, since it uses as much as digits as its factorization.

40136965679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 40136965679 in words is "forty billion, one hundred thirty-six million, nine hundred sixty-five thousand, six hundred seventy-nine".