40044539877197 has 2 divisors, whose sum is σ = 40044539877198. Its totient is φ = 40044539877196.

The previous prime is 40044539877151. The next prime is 40044539877241. The reversal of 40044539877197 is 79177893544004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34019351077321 + 6025188799876 = 5832611^2 + 2454626^2 .

It is a cyclic number.

It is not a de Polignac number, because 40044539877197 - 2²⁰ = 40044538828621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40044539871197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20022269938598 + 20022269938599.

It is an arithmetic number, because the mean of its divisors is an integer number (20022269938599).

Almost surely, 2^{40044539877197} is an apocalyptic number.

It is an amenable number.

40044539877197 is a deficient number, since it is larger than the sum of its proper divisors (1).

40044539877197 is an equidigital number, since it uses as much as digits as its factorization.

40044539877197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 213373440, while the sum is 68.

The spelling of 40044539877197 in words is "forty trillion, forty-four billion, five hundred thirty-nine million, eight hundred seventy-seven thousand, one hundred ninety-seven".