253375921969 has 4 divisors (see below), whose sum is σ = 258156599796. Its totient is φ = 248595244144.

The previous prime is 253375921963. The next prime is 253375921973. The reversal of 253375921969 is 969129573352.

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 134257753744 + 119118168225 = 366412^2 + 345135^2 .

It is a cyclic number.

It is not a de Polignac number, because 253375921969 - 2²¹ = 253373824817 is a prime.

It is a super-2 number, since 2×253375921969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253375921963) 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, 2390338834 + ... + 2390338939.

It is an arithmetic number, because the mean of its divisors is an integer number (64539149949).

Almost surely, 2^253375921969 is an apocalyptic number.

It is an amenable number.

253375921969 is a deficient number, since it is larger than the sum of its proper divisors (4780677827).

253375921969 is an equidigital number, since it uses as much as digits as its factorization.

253375921969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780677826.

The product of its digits is 27556200, while the sum is 61.

The spelling of 253375921969 in words is "two hundred fifty-three billion, three hundred seventy-five million, nine hundred twenty-one thousand, nine hundred sixty-nine".