253426644557 has 2 divisors, whose sum is σ = 253426644558. Its totient is φ = 253426644556.

The previous prime is 253426644539. The next prime is 253426644623. The reversal of 253426644557 is 755446624352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162400134121 + 91026510436 = 402989^2 + 301706^2 .

It is a cyclic number.

It is not a de Polignac number, because 253426644557 - 2¹⁸ = 253426382413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253426644499 and 253426644508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253426644257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126713322278 + 126713322279.

It is an arithmetic number, because the mean of its divisors is an integer number (126713322279).

Almost surely, 2^253426644557 is an apocalyptic number.

It is an amenable number.

253426644557 is a deficient number, since it is larger than the sum of its proper divisors (1).

253426644557 is an equidigital number, since it uses as much as digits as its factorization.

253426644557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192000, while the sum is 53.

The spelling of 253426644557 in words is "two hundred fifty-three billion, four hundred twenty-six million, six hundred forty-four thousand, five hundred fifty-seven".