2257762778 has 4 divisors (see below), whose sum is σ = 3386644170. Its totient is φ = 1128881388.

The previous prime is 2257762757. The next prime is 2257762807. The reversal of 2257762778 is 8772677522.

2257762778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 1419254929 + 838507849 = 37673^2 + 28957^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564440693 + ... + 564440696.

Almost surely, 2^2257762778 is an apocalyptic number.

2257762778 is a deficient number, since it is larger than the sum of its proper divisors (1128881392).

2257762778 is a wasteful number, since it uses less digits than its factorization.

2257762778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128881391.

The product of its digits is 4609920, while the sum is 53.

The square root of 2257762778 is about 47515.9213106512. The cubic root of 2257762778 is about 1311.8759475989.

The spelling of 2257762778 in words is "two billion, two hundred fifty-seven million, seven hundred sixty-two thousand, seven hundred seventy-eight".