40402155197 has 2 divisors, whose sum is σ = 40402155198. Its totient is φ = 40402155196.

The previous prime is 40402155173. The next prime is 40402155247. The reversal of 40402155197 is 79155120404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30224170201 + 10177984996 = 173851^2 + 100886^2 .

It is a cyclic number.

It is not a de Polignac number, because 40402155197 - 2⁶ = 40402155133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40402155197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40402155107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20201077598 + 20201077599.

It is an arithmetic number, because the mean of its divisors is an integer number (20201077599).

Almost surely, 2^40402155197 is an apocalyptic number.

It is an amenable number.

40402155197 is a deficient number, since it is larger than the sum of its proper divisors (1).

40402155197 is an equidigital number, since it uses as much as digits as its factorization.

40402155197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 40402155197 in words is "forty billion, four hundred two million, one hundred fifty-five thousand, one hundred ninety-seven".