4257646778 has 32 divisors (see below), whose sum is σ = 8003664000. Its totient is φ = 1650216960.

The previous prime is 4257646759. The next prime is 4257646793. The reversal of 4257646778 is 8776467524.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41903 + ... + 101346.

It is an arithmetic number, because the mean of its divisors is an integer number (250114500).

Almost surely, 2^4257646778 is an apocalyptic number.

4257646778 is a deficient number, since it is larger than the sum of its proper divisors (3746017222).

4257646778 is a wasteful number, since it uses less digits than its factorization.

4257646778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143462.

The product of its digits is 15805440, while the sum is 56.

The square root of 4257646778 is about 65250.6458052332. The cubic root of 4257646778 is about 1620.7767927873.

The spelling of 4257646778 in words is "four billion, two hundred fifty-seven million, six hundred forty-six thousand, seven hundred seventy-eight".