325557601861 has 2 divisors, whose sum is σ = 325557601862. Its totient is φ = 325557601860.

The previous prime is 325557601849. The next prime is 325557601871. The reversal of 325557601861 is 168106755523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323867980836 + 1689621025 = 569094^2 + 41105^2 .

It is a cyclic number.

It is not a de Polignac number, because 325557601861 - 2⁹ = 325557601349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325557601841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162778800930 + 162778800931.

It is an arithmetic number, because the mean of its divisors is an integer number (162778800931).

Almost surely, 2^325557601861 is an apocalyptic number.

It is an amenable number.

325557601861 is a deficient number, since it is larger than the sum of its proper divisors (1).

325557601861 is an equidigital number, since it uses as much as digits as its factorization.

325557601861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 49.

The spelling of 325557601861 in words is "three hundred twenty-five billion, five hundred fifty-seven million, six hundred one thousand, eight hundred sixty-one".