40122420557 has 2 divisors, whose sum is σ = 40122420558. Its totient is φ = 40122420556.

The previous prime is 40122420467. The next prime is 40122420599. The reversal of 40122420557 is 75502422104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31325106121 + 8797314436 = 176989^2 + 93794^2 .

It is a cyclic number.

It is not a de Polignac number, because 40122420557 - 2¹⁴ = 40122404173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40122425557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20061210278 + 20061210279.

It is an arithmetic number, because the mean of its divisors is an integer number (20061210279).

Almost surely, 2^40122420557 is an apocalyptic number.

It is an amenable number.

40122420557 is a deficient number, since it is larger than the sum of its proper divisors (1).

40122420557 is an equidigital number, since it uses as much as digits as its factorization.

40122420557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22400, while the sum is 32.

The spelling of 40122420557 in words is "forty billion, one hundred twenty-two million, four hundred twenty thousand, five hundred fifty-seven".