2549191156 has 6 divisors (see below), whose sum is σ = 4461084530. Its totient is φ = 1274595576.

The previous prime is 2549191121. The next prime is 2549191189. The reversal of 2549191156 is 6511919452.

It can be written as a sum of positive squares in only one way, i.e., 2433843556 + 115347600 = 49334^2 + 10740^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318648891 + ... + 318648898.

Almost surely, 2^2549191156 is an apocalyptic number.

It is an amenable number.

2549191156 is a deficient number, since it is larger than the sum of its proper divisors (1911893374).

2549191156 is a wasteful number, since it uses less digits than its factorization.

2549191156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637297793 (or 637297791 counting only the distinct ones).

The product of its digits is 97200, while the sum is 43.

The square root of 2549191156 is about 50489.5153076359. The cubic root of 2549191156 is about 1366.0527430443.

The spelling of 2549191156 in words is "two billion, five hundred forty-nine million, one hundred ninety-one thousand, one hundred fifty-six".