257583901723 has 4 divisors (see below), whose sum is σ = 272735895960. Its totient is φ = 242431907488.

The previous prime is 257583901717. The next prime is 257583901739. The reversal of 257583901723 is 327109385752.

It is a happy number.

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-257583901723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257583901763) 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, 7575997093 + ... + 7575997126.

It is an arithmetic number, because the mean of its divisors is an integer number (68183973990).

Almost surely, 2^257583901723 is an apocalyptic number.

257583901723 is a deficient number, since it is larger than the sum of its proper divisors (15151994237).

257583901723 is a wasteful number, since it uses less digits than its factorization.

257583901723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15151994236.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 257583901723 in words is "two hundred fifty-seven billion, five hundred eighty-three million, nine hundred one thousand, seven hundred twenty-three".