253868591503 has 4 divisors (see below), whose sum is σ = 268802038080. Its totient is φ = 238935144928.

The previous prime is 253868591491. The next prime is 253868591551. The reversal of 253868591503 is 305195868352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253868591503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253868591303) 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, 7466723263 + ... + 7466723296.

It is an arithmetic number, because the mean of its divisors is an integer number (67200509520).

Almost surely, 2^253868591503 is an apocalyptic number.

253868591503 is a deficient number, since it is larger than the sum of its proper divisors (14933446577).

253868591503 is a wasteful number, since it uses less digits than its factorization.

253868591503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14933446576.

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 253868591503 in words is "two hundred fifty-three billion, eight hundred sixty-eight million, five hundred ninety-one thousand, five hundred three".