257432960837 has 4 divisors (see below), whose sum is σ = 277235496300. Its totient is φ = 237630425376.

The previous prime is 257432960809. The next prime is 257432960923. The reversal of 257432960837 is 738069234752.

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 53706208516 + 203726752321 = 231746^2 + 451361^2 .

It is a cyclic number.

It is not a de Polignac number, because 257432960837 - 2¹² = 257432956741 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 (257432960537) 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, 9901267712 + ... + 9901267737.

It is an arithmetic number, because the mean of its divisors is an integer number (69308874075).

Almost surely, 2^257432960837 is an apocalyptic number.

It is an amenable number.

257432960837 is a deficient number, since it is larger than the sum of its proper divisors (19802535463).

257432960837 is a wasteful number, since it uses less digits than its factorization.

257432960837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19802535462.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 257432960837 in words is "two hundred fifty-seven billion, four hundred thirty-two million, nine hundred sixty thousand, eight hundred thirty-seven".