40421147855497 has 2 divisors, whose sum is σ = 40421147855498. Its totient is φ = 40421147855496.

The previous prime is 40421147855489. The next prime is 40421147855521. The reversal of 40421147855497 is 79455874112404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37992627681856 + 2428520173641 = 6163816^2 + 1558371^2 .

It is a cyclic number.

It is not a de Polignac number, because 40421147855497 - 2³ = 40421147855489 is a prime.

It is not a weakly prime, because it can be changed into another prime (40421147855477) 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, 20210573927748 + 20210573927749.

It is an arithmetic number, because the mean of its divisors is an integer number (20210573927749).

Almost surely, 2^{40421147855497} is an apocalyptic number.

It is an amenable number.

40421147855497 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421147855497 is an equidigital number, since it uses as much as digits as its factorization.

40421147855497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45158400, while the sum is 61.

The spelling of 40421147855497 in words is "forty trillion, four hundred twenty-one billion, one hundred forty-seven million, eight hundred fifty-five thousand, four hundred ninety-seven".