192880621561 has 2 divisors, whose sum is σ = 192880621562. Its totient is φ = 192880621560.

The previous prime is 192880621553. The next prime is 192880621579. The reversal of 192880621561 is 165126088291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102080250000 + 90800371561 = 319500^2 + 301331^2 .

It is a cyclic number.

It is not a de Polignac number, because 192880621561 - 2³ = 192880621553 is a prime.

It is not a weakly prime, because it can be changed into another prime (192880621501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96440310780 + 96440310781.

It is an arithmetic number, because the mean of its divisors is an integer number (96440310781).

Almost surely, 2^192880621561 is an apocalyptic number.

It is an amenable number.

192880621561 is a deficient number, since it is larger than the sum of its proper divisors (1).

192880621561 is an equidigital number, since it uses as much as digits as its factorization.

192880621561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 192880621561 in words is "one hundred ninety-two billion, eight hundred eighty million, six hundred twenty-one thousand, five hundred sixty-one".