2557233494 has 4 divisors (see below), whose sum is σ = 3835850244. Its totient is φ = 1278616746.

The previous prime is 2557233491. The next prime is 2557233533. The reversal of 2557233494 is 4943327552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557233491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639308372 + ... + 639308375.

It is an arithmetic number, because the mean of its divisors is an integer number (958962561).

Almost surely, 2^2557233494 is an apocalyptic number.

2557233494 is a deficient number, since it is larger than the sum of its proper divisors (1278616750).

2557233494 is a wasteful number, since it uses less digits than its factorization.

2557233494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278616749.

The product of its digits is 907200, while the sum is 44.

The square root of 2557233494 is about 50569.0962347559. The cubic root of 2557233494 is about 1367.4878027759.

The spelling of 2557233494 in words is "two billion, five hundred fifty-seven million, two hundred thirty-three thousand, four hundred ninety-four".