40389026809597 has 2 divisors, whose sum is σ = 40389026809598. Its totient is φ = 40389026809596.

The previous prime is 40389026809553. The next prime is 40389026809693. The reversal of 40389026809597 is 79590862098304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37631587222681 + 2757439586916 = 6134459^2 + 1660554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40389026809597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40389026809897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20194513404798 + 20194513404799.

It is an arithmetic number, because the mean of its divisors is an integer number (20194513404799).

Almost surely, 2^{40389026809597} is an apocalyptic number.

It is an amenable number.

40389026809597 is a deficient number, since it is larger than the sum of its proper divisors (1).

40389026809597 is an equidigital number, since it uses as much as digits as its factorization.

40389026809597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235146240, while the sum is 70.

The spelling of 40389026809597 in words is "forty trillion, three hundred eighty-nine billion, twenty-six million, eight hundred nine thousand, five hundred ninety-seven".