40263195397 has 2 divisors, whose sum is σ = 40263195398. Its totient is φ = 40263195396.

The previous prime is 40263195361. The next prime is 40263195407. The reversal of 40263195397 is 79359136204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20447284036 + 19815911361 = 142994^2 + 140769^2 .

It is a cyclic number.

It is not a de Polignac number, because 40263195397 - 2²³ = 40254806789 is a prime.

It is a super-2 number, since 2×40263195397² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40263195397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40263195347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20131597698 + 20131597699.

It is an arithmetic number, because the mean of its divisors is an integer number (20131597699).

Almost surely, 2^40263195397 is an apocalyptic number.

It is an amenable number.

40263195397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40263195397 is an equidigital number, since it uses as much as digits as its factorization.

40263195397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 40263195397 in words is "forty billion, two hundred sixty-three million, one hundred ninety-five thousand, three hundred ninety-seven".