253551723439 has 4 divisors (see below), whose sum is σ = 289773398224. Its totient is φ = 217330048656.

The previous prime is 253551723413. The next prime is 253551723493. The reversal of 253551723439 is 934327155352.

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

It is not a de Polignac number, because 253551723439 - 2¹¹ = 253551721391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253551723392 and 253551723401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253551723239) 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, 18110837382 + ... + 18110837395.

It is an arithmetic number, because the mean of its divisors is an integer number (72443349556).

Almost surely, 2^253551723439 is an apocalyptic number.

253551723439 is a deficient number, since it is larger than the sum of its proper divisors (36221674785).

253551723439 is an equidigital number, since it uses as much as digits as its factorization.

253551723439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36221674784.

The product of its digits is 3402000, while the sum is 49.

The spelling of 253551723439 in words is "two hundred fifty-three billion, five hundred fifty-one million, seven hundred twenty-three thousand, four hundred thirty-nine".