2537985391 has 4 divisors (see below), whose sum is σ = 2555019000. Its totient is φ = 2520951784.

The previous prime is 2537985367. The next prime is 2537985397. The reversal of 2537985391 is 1935897352.

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 2537985391 - 2⁹ = 2537984879 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 (2537985397) 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, 8516581 + ... + 8516878.

It is an arithmetic number, because the mean of its divisors is an integer number (638754750).

Almost surely, 2^2537985391 is an apocalyptic number.

2537985391 is a deficient number, since it is larger than the sum of its proper divisors (17033609).

2537985391 is a wasteful number, since it uses less digits than its factorization.

2537985391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17033608.

The product of its digits is 2041200, while the sum is 52.

The square root of 2537985391 is about 50378.4218788163. The cubic root of 2537985391 is about 1364.0481659204.

The spelling of 2537985391 in words is "two billion, five hundred thirty-seven million, nine hundred eighty-five thousand, three hundred ninety-one".