561672513901 has 2 divisors, whose sum is σ = 561672513902. Its totient is φ = 561672513900.

The previous prime is 561672513781. The next prime is 561672513907. The reversal of 561672513901 is 109315276165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425754945001 + 135917568900 = 652499^2 + 368670^2 .

It is a cyclic number.

It is not a de Polignac number, because 561672513901 - 2²⁹ = 561135642989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561672513907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280836256950 + 280836256951.

It is an arithmetic number, because the mean of its divisors is an integer number (280836256951).

Almost surely, 2^561672513901 is an apocalyptic number.

It is an amenable number.

561672513901 is a deficient number, since it is larger than the sum of its proper divisors (1).

561672513901 is an equidigital number, since it uses as much as digits as its factorization.

561672513901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 561672513901 in words is "five hundred sixty-one billion, six hundred seventy-two million, five hundred thirteen thousand, nine hundred one".