253775561401 has 4 divisors (see below), whose sum is σ = 253781302500. Its totient is φ = 253769820304.

The previous prime is 253775561393. The next prime is 253775561471. The reversal of 253775561401 is 104165577352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91414917801 + 162360643600 = 302349^2 + 402940^2 .

It is a cyclic number.

It is not a de Polignac number, because 253775561401 - 2³ = 253775561393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253775561471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2803726 + ... + 2892823.

It is an arithmetic number, because the mean of its divisors is an integer number (63445325625).

Almost surely, 2^253775561401 is an apocalyptic number.

It is an amenable number.

253775561401 is a deficient number, since it is larger than the sum of its proper divisors (5741099).

253775561401 is an equidigital number, since it uses as much as digits as its factorization.

253775561401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741098.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 253775561401 in words is "two hundred fifty-three billion, seven hundred seventy-five million, five hundred sixty-one thousand, four hundred one".