4645904861 has 4 divisors (see below), whose sum is σ = 5003282172. Its totient is φ = 4288527552.

The previous prime is 4645904827. The next prime is 4645904863. The reversal of 4645904861 is 1684095464.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1536169636 + 3109735225 = 39194^2 + 55765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4645904861 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 (4645904863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178688636 + ... + 178688661.

It is an arithmetic number, because the mean of its divisors is an integer number (1250820543).

Almost surely, 2^4645904861 is an apocalyptic number.

It is an amenable number.

4645904861 is a deficient number, since it is larger than the sum of its proper divisors (357377311).

4645904861 is a wasteful number, since it uses less digits than its factorization.

4645904861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357377310.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 4645904861 is about 68160.8748550075. The cubic root of 4645904861 is about 1668.6174102999.

The spelling of 4645904861 in words is "four billion, six hundred forty-five million, nine hundred four thousand, eight hundred sixty-one".