402578117129 has 2 divisors, whose sum is σ = 402578117130. Its totient is φ = 402578117128.

The previous prime is 402578117119. The next prime is 402578117203. The reversal of 402578117129 is 921711875204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220287545104 + 182290572025 = 469348^2 + 426955^2 .

It is a cyclic number.

It is not a de Polignac number, because 402578117129 - 2⁸ = 402578116873 is a prime.

It is a super-2 number, since 2×402578117129² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402578117119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201289058564 + 201289058565.

It is an arithmetic number, because the mean of its divisors is an integer number (201289058565).

Almost surely, 2^402578117129 is an apocalyptic number.

It is an amenable number.

402578117129 is a deficient number, since it is larger than the sum of its proper divisors (1).

402578117129 is an equidigital number, since it uses as much as digits as its factorization.

402578117129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 402578117129 in words is "four hundred two billion, five hundred seventy-eight million, one hundred seventeen thousand, one hundred twenty-nine".