253557265601 has 2 divisors, whose sum is σ = 253557265602. Its totient is φ = 253557265600.

The previous prime is 253557265571. The next prime is 253557265669. The reversal of 253557265601 is 106562755352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206315808400 + 47241457201 = 454220^2 + 217351^2 .

It is a cyclic number.

It is not a de Polignac number, because 253557265601 - 2¹⁰ = 253557264577 is a prime.

It is not a weakly prime, because it can be changed into another prime (253557265691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126778632800 + 126778632801.

It is an arithmetic number, because the mean of its divisors is an integer number (126778632801).

Almost surely, 2^253557265601 is an apocalyptic number.

It is an amenable number.

253557265601 is a deficient number, since it is larger than the sum of its proper divisors (1).

253557265601 is an equidigital number, since it uses as much as digits as its factorization.

253557265601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890000, while the sum is 47.

The spelling of 253557265601 in words is "two hundred fifty-three billion, five hundred fifty-seven million, two hundred sixty-five thousand, six hundred one".