257702364043 has 4 divisors (see below), whose sum is σ = 257748004960. Its totient is φ = 257656723128.

The previous prime is 257702364037. The next prime is 257702364103. The reversal of 257702364043 is 340463207752.

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

It is a cyclic number.

It is not a de Polignac number, because 257702364043 - 2¹⁷ = 257702232971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257702364343) 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, 22811988 + ... + 22823281.

It is an arithmetic number, because the mean of its divisors is an integer number (64437001240).

Almost surely, 2^257702364043 is an apocalyptic number.

257702364043 is a deficient number, since it is larger than the sum of its proper divisors (45640917).

257702364043 is an equidigital number, since it uses as much as digits as its factorization.

257702364043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45640916.

The product of its (nonzero) digits is 846720, while the sum is 43.

The spelling of 257702364043 in words is "two hundred fifty-seven billion, seven hundred two million, three hundred sixty-four thousand, forty-three".