402544607610641 has 2 divisors, whose sum is σ = 402544607610642. Its totient is φ = 402544607610640.

The previous prime is 402544607610583. The next prime is 402544607610707. The reversal of 402544607610641 is 146016706445204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354640269291025 + 47904338319616 = 18831895^2 + 6921296^2 .

It is a cyclic number.

It is not a de Polignac number, because 402544607610641 - 2⁶ = 402544607610577 is a prime.

It is a super-2 number, since 2×402544607610641² (a number of 30 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 402544607610641.

It is not a weakly prime, because it can be changed into another prime (402544603610641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201272303805320 + 201272303805321.

It is an arithmetic number, because the mean of its divisors is an integer number (201272303805321).

Almost surely, 2^{402544607610641} is an apocalyptic number.

It is an amenable number.

402544607610641 is a deficient number, since it is larger than the sum of its proper divisors (1).

402544607610641 is an equidigital number, since it uses as much as digits as its factorization.

402544607610641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 402544607610641 in words is "four hundred two trillion, five hundred forty-four billion, six hundred seven million, six hundred ten thousand, six hundred forty-one".