2537678257 has 4 divisors (see below), whose sum is σ = 2538197620. Its totient is φ = 2537158896.

The previous prime is 2537678249. The next prime is 2537678279. The reversal of 2537678257 is 7528767352.

2537678257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1431184561 + 1106493696 = 37831^2 + 33264^2 .

It is a cyclic number.

It is not a de Polignac number, because 2537678257 - 2³ = 2537678249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2537678287) 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, 252282 + ... + 262147.

It is an arithmetic number, because the mean of its divisors is an integer number (634549405).

Almost surely, 2^2537678257 is an apocalyptic number.

It is an amenable number.

2537678257 is a deficient number, since it is larger than the sum of its proper divisors (519363).

2537678257 is an equidigital number, since it uses as much as digits as its factorization.

2537678257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519362.

The product of its digits is 4939200, while the sum is 52.

The square root of 2537678257 is about 50375.3735172257. The cubic root of 2537678257 is about 1363.9931403252.

The spelling of 2537678257 in words is "two billion, five hundred thirty-seven million, six hundred seventy-eight thousand, two hundred fifty-seven".