102561922409 has 2 divisors, whose sum is σ = 102561922410. Its totient is φ = 102561922408.

The previous prime is 102561922399. The next prime is 102561922459. The reversal of 102561922409 is 904229165201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96842328025 + 5719594384 = 311195^2 + 75628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102561922409 is a prime.

It is not a weakly prime, because it can be changed into another prime (102561922459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51280961204 + 51280961205.

It is an arithmetic number, because the mean of its divisors is an integer number (51280961205).

Almost surely, 2^102561922409 is an apocalyptic number.

It is an amenable number.

102561922409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102561922409 is an equidigital number, since it uses as much as digits as its factorization.

102561922409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 102561922409 in words is "one hundred two billion, five hundred sixty-one million, nine hundred twenty-two thousand, four hundred nine".