2555597138 has 4 divisors (see below), whose sum is σ = 3833395710. Its totient is φ = 1277798568.

The previous prime is 2555597123. The next prime is 2555597167. The reversal of 2555597138 is 8317955552.

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

It can be written as a sum of positive squares in only one way, i.e., 2549947009 + 5650129 = 50497^2 + 2377^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638899283 + ... + 638899286.

Almost surely, 2^2555597138 is an apocalyptic number.

2555597138 is a deficient number, since it is larger than the sum of its proper divisors (1277798572).

2555597138 is a wasteful number, since it uses less digits than its factorization.

2555597138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277798571.

The product of its digits is 1890000, while the sum is 50.

The square root of 2555597138 is about 50552.9142384492. The cubic root of 2555597138 is about 1367.1960585477.

The spelling of 2555597138 in words is "two billion, five hundred fifty-five million, five hundred ninety-seven thousand, one hundred thirty-eight".