4778891802 has 12 divisors (see below), whose sum is σ = 10354265610. Its totient is φ = 1592963928.

The previous prime is 4778891801. The next prime is 4778891813. The reversal of 4778891802 is 2081988774.

It is a happy number.

4778891802 is a `hidden beast` number, since 477 + 8 + 8 + 91 + 80 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4076694801 + 702197001 = 63849^2 + 26499^2 .

It is not an unprimeable number, because it can be changed into a prime (4778891801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132746977 + ... + 132747012.

Almost surely, 2^4778891802 is an apocalyptic number.

4778891802 is an abundant number, since it is smaller than the sum of its proper divisors (5575373808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4778891802 is a wasteful number, since it uses less digits than its factorization.

4778891802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265493997 (or 265493994 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The square root of 4778891802 is about 69129.5291608441. The cubic root of 4778891802 is about 1684.3890105170.

The spelling of 4778891802 in words is "four billion, seven hundred seventy-eight million, eight hundred ninety-one thousand, eight hundred two".