4418778791 has 42 divisors (see below), whose sum is σ = 5465024712. Its totient is φ = 3571823640.

The previous prime is 4418778787. The next prime is 4418778799. The reversal of 4418778791 is 1978778144.

It is not a de Polignac number, because 4418778791 - 2² = 4418778787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4418778799) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 62236286 + ... + 62236356.

It is an arithmetic number, because the mean of its divisors is an integer number (130119636).

Almost surely, 2^4418778791 is an apocalyptic number.

4418778791 is a deficient number, since it is larger than the sum of its proper divisors (1046245921).

4418778791 is an frugal number, since it uses more digits than its factorization.

4418778791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 101 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 56.

The square root of 4418778791 is about 66473.8955605883. The cubic root of 4418778791 is about 1640.9704239553.

The spelling of 4418778791 in words is "four billion, four hundred eighteen million, seven hundred seventy-eight thousand, seven hundred ninety-one".