140043977858717 has 2 divisors, whose sum is σ = 140043977858718. Its totient is φ = 140043977858716.

The previous prime is 140043977858713. The next prime is 140043977858747. The reversal of 140043977858717 is 717858779340041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125954359797721 + 14089618060996 = 11222939^2 + 3753614^2 .

It is an emirp because it is prime and its reverse (717858779340041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140043977858717 - 2² = 140043977858713 is a prime.

It is a super-2 number, since 2×140043977858717² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140043977858711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70021988929358 + 70021988929359.

It is an arithmetic number, because the mean of its divisors is an integer number (70021988929359).

Almost surely, 2^{140043977858717} is an apocalyptic number.

It is an amenable number.

140043977858717 is a deficient number, since it is larger than the sum of its proper divisors (1).

140043977858717 is an equidigital number, since it uses as much as digits as its factorization.

140043977858717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331914240, while the sum is 71.

The spelling of 140043977858717 in words is "one hundred forty trillion, forty-three billion, nine hundred seventy-seven million, eight hundred fifty-eight thousand, seven hundred seventeen".