2778202257 has 8 divisors (see below), whose sum is σ = 3724964640. Its totient is φ = 1841787360.

The previous prime is 2778202241. The next prime is 2778202261. The reversal of 2778202257 is 7522028772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2778202257 - 2⁴ = 2778202241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2778202277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2586244 + ... + 2587317.

It is an arithmetic number, because the mean of its divisors is an integer number (465620580).

Almost surely, 2^2778202257 is an apocalyptic number.

It is an amenable number.

2778202257 is a deficient number, since it is larger than the sum of its proper divisors (946762383).

2778202257 is a wasteful number, since it uses less digits than its factorization.

2778202257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173743.

The product of its (nonzero) digits is 219520, while the sum is 42.

The square root of 2778202257 is about 52708.6544791270. The cubic root of 2778202257 is about 1405.7927091176.

The spelling of 2778202257 in words is "two billion, seven hundred seventy-eight million, two hundred two thousand, two hundred fifty-seven".