253155405553 has 2 divisors, whose sum is σ = 253155405554. Its totient is φ = 253155405552.

The previous prime is 253155405521. The next prime is 253155405557. The reversal of 253155405553 is 355504551352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224990846224 + 28164559329 = 474332^2 + 167823^2 .

It is a cyclic number.

It is not a de Polignac number, because 253155405553 - 2⁵ = 253155405521 is a prime.

It is not a weakly prime, because it can be changed into another prime (253155405557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126577702776 + 126577702777.

It is an arithmetic number, because the mean of its divisors is an integer number (126577702777).

Almost surely, 2^253155405553 is an apocalyptic number.

It is an amenable number.

253155405553 is a deficient number, since it is larger than the sum of its proper divisors (1).

253155405553 is an equidigital number, since it uses as much as digits as its factorization.

253155405553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125000, while the sum is 43.

The spelling of 253155405553 in words is "two hundred fifty-three billion, one hundred fifty-five million, four hundred five thousand, five hundred fifty-three".