4638778364 has 24 divisors (see below), whose sum is σ = 9044275968. Its totient is φ = 2063672240.

The previous prime is 4638778337. The next prime is 4638778421.

4638778364 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119494 + ... + 1123629.

It is an arithmetic number, because the mean of its divisors is an integer number (376844832).

Almost surely, 2^4638778364 is an apocalyptic number.

4638778364 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4638778364 is a deficient number, since it is larger than the sum of its proper divisors (4405497604).

4638778364 is a wasteful number, since it uses less digits than its factorization.

4638778364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243185 (or 2243183 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 56.

The square root of 4638778364 is about 68108.5777564030. The cubic root of 4638778364 is about 1667.7637924217.

The spelling of 4638778364 in words is "four billion, six hundred thirty-eight million, seven hundred seventy-eight thousand, three hundred sixty-four".