40437717797 has 2 divisors, whose sum is σ = 40437717798. Its totient is φ = 40437717796.

The previous prime is 40437717713. The next prime is 40437717823. The reversal of 40437717797 is 79771773404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40430753476 + 6964321 = 201074^2 + 2639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40437717797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40437719797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20218858898 + 20218858899.

It is an arithmetic number, because the mean of its divisors is an integer number (20218858899).

Almost surely, 2^40437717797 is an apocalyptic number.

It is an amenable number.

40437717797 is a deficient number, since it is larger than the sum of its proper divisors (1).

40437717797 is an equidigital number, since it uses as much as digits as its factorization.

40437717797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7260624, while the sum is 56.

The spelling of 40437717797 in words is "forty billion, four hundred thirty-seven million, seven hundred seventeen thousand, seven hundred ninety-seven".