4778531905 has 8 divisors (see below), whose sum is σ = 6553415232. Its totient is φ = 3276707568.

The previous prime is 4778531903. The next prime is 4778531951. The reversal of 4778531905 is 5091358774.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4778531905 - 2¹ = 4778531903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4778531903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68264707 + ... + 68264776.

It is an arithmetic number, because the mean of its divisors is an integer number (819176904).

Almost surely, 2^4778531905 is an apocalyptic number.

It is an amenable number.

4778531905 is a deficient number, since it is larger than the sum of its proper divisors (1774883327).

4778531905 is a wasteful number, since it uses less digits than its factorization.

4778531905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136529495.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 4778531905 is about 69126.9260491163. The cubic root of 4778531905 is about 1684.3467258343.

The spelling of 4778531905 in words is "four billion, seven hundred seventy-eight million, five hundred thirty-one thousand, nine hundred five".