4778233791 has 16 divisors (see below), whose sum is σ = 6710246400. Its totient is φ = 3016052928.

The previous prime is 4778233787. The next prime is 4778233847. The reversal of 4778233791 is 1973328774.

It is a happy number.

It is not a de Polignac number, because 4778233791 - 2² = 4778233787 is a prime.

It is a super-2 number, since 2×4778233791² = 45663036322908463362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778233721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76435 + ... + 124091.

It is an arithmetic number, because the mean of its divisors is an integer number (419390400).

Almost surely, 2^4778233791 is an apocalyptic number.

4778233791 is a deficient number, since it is larger than the sum of its proper divisors (1932012609).

4778233791 is a wasteful number, since it uses less digits than its factorization.

4778233791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49438.

The product of its digits is 1778112, while the sum is 51.

The square root of 4778233791 is about 69124.7697356020. The cubic root of 4778233791 is about 1684.3116984945.

The spelling of 4778233791 in words is "four billion, seven hundred seventy-eight million, two hundred thirty-three thousand, seven hundred ninety-one".