2553778 has 4 divisors (see below), whose sum is σ = 3830670. Its totient is φ = 1276888.

The previous prime is 2553751. The next prime is 2553781. The reversal of 2553778 is 8773552.

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., 2537649 + 16129 = 1593^2 + 127^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638443 + ... + 638446.

2^2553778 is an apocalyptic number.

2553778 is a deficient number, since it is larger than the sum of its proper divisors (1276892).

2553778 is a wasteful number, since it uses less digits than its factorization.

2553778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276891.

The product of its digits is 58800, while the sum is 37.

The square root of 2553778 is about 1598.0544421264. The cubic root of 2553778 is about 136.6871580088.

The spelling of 2553778 in words is "two million, five hundred fifty-three thousand, seven hundred seventy-eight".