4778404621 has 8 divisors (see below), whose sum is σ = 4804033464. Its totient is φ = 4752844800.

The previous prime is 4778404577. The next prime is 4778404643. The reversal of 4778404621 is 1264048774.

It can be written as a sum of positive squares in 4 ways, for example, as 2239655625 + 2538748996 = 47325^2 + 50386^2 .

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 4778404621 - 2²¹ = 4776307469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778404321) 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, 124675 + ... + 158431.

It is an arithmetic number, because the mean of its divisors is an integer number (600504183).

Almost surely, 2^4778404621 is an apocalyptic number.

It is an amenable number.

4778404621 is a deficient number, since it is larger than the sum of its proper divisors (25628843).

4778404621 is a wasteful number, since it uses less digits than its factorization.

4778404621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34511.

The product of its (nonzero) digits is 301056, while the sum is 43.

The square root of 4778404621 is about 69126.0053887103. The cubic root of 4778404621 is about 1684.3317705931.

The spelling of 4778404621 in words is "four billion, seven hundred seventy-eight million, four hundred four thousand, six hundred twenty-one".