253557265669 has 2 divisors, whose sum is σ = 253557265670. Its totient is φ = 253557265668.

The previous prime is 253557265601. The next prime is 253557265679. The reversal of 253557265669 is 966562755352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137455562500 + 116101703169 = 370750^2 + 340737^2 .

It is a cyclic number.

It is not a de Polignac number, because 253557265669 - 2³¹ = 251409782021 is a prime.

It is a super-2 number, since 2×253557265669² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253557265679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126778632834 + 126778632835.

It is an arithmetic number, because the mean of its divisors is an integer number (126778632835).

Almost surely, 2^253557265669 is an apocalyptic number.

It is an amenable number.

253557265669 is a deficient number, since it is larger than the sum of its proper divisors (1).

253557265669 is an equidigital number, since it uses as much as digits as its factorization.

253557265669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060000, while the sum is 61.

The spelling of 253557265669 in words is "two hundred fifty-three billion, five hundred fifty-seven million, two hundred sixty-five thousand, six hundred sixty-nine".