4521646791 has 48 divisors (see below), whose sum is σ = 7032373920. Its totient is φ = 2789406720.

The previous prime is 4521646781. The next prime is 4521646793. The reversal of 4521646791 is 1976461254.

4521646791 is a `hidden beast` number, since 4 + 521 + 64 + 67 + 9 + 1 = 666.

It is not a de Polignac number, because 4521646791 - 2⁷ = 4521646663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521646793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6377145 + ... + 6377853.

It is an arithmetic number, because the mean of its divisors is an integer number (146507790).

Almost surely, 2^4521646791 is an apocalyptic number.

4521646791 is a deficient number, since it is larger than the sum of its proper divisors (2510727129).

4521646791 is a wasteful number, since it uses less digits than its factorization.

4521646791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1373 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 4521646791 is about 67243.1914099859. The cubic root of 4521646791 is about 1653.6066549962.

The spelling of 4521646791 in words is "four billion, five hundred twenty-one million, six hundred forty-six thousand, seven hundred ninety-one".