253144039661 has 2 divisors, whose sum is σ = 253144039662. Its totient is φ = 253144039660.

The previous prime is 253144039651. The next prime is 253144039667. The reversal of 253144039661 is 166930441352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239322510436 + 13821529225 = 489206^2 + 117565^2 .

It is a cyclic number.

It is not a de Polignac number, because 253144039661 - 2³⁰ = 252070297837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253144039667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126572019830 + 126572019831.

It is an arithmetic number, because the mean of its divisors is an integer number (126572019831).

Almost surely, 2^253144039661 is an apocalyptic number.

It is an amenable number.

253144039661 is a deficient number, since it is larger than the sum of its proper divisors (1).

253144039661 is an equidigital number, since it uses as much as digits as its factorization.

253144039661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 253144039661 in words is "two hundred fifty-three billion, one hundred forty-four million, thirty-nine thousand, six hundred sixty-one".