4785221782591 has 16 divisors (see below), whose sum is σ = 4913624757888. Its totient is φ = 4658464512000.

The previous prime is 4785221782571. The next prime is 4785221782619. The reversal of 4785221782591 is 1952871225874.

It is a cyclic number.

It is not a de Polignac number, because 4785221782591 - 2²¹ = 4785219685439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4785221782571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16820170 + ... + 17102296.

It is an arithmetic number, because the mean of its divisors is an integer number (307101547368).

Almost surely, 2^{4785221782591} is an apocalyptic number.

4785221782591 is a deficient number, since it is larger than the sum of its proper divisors (128402975297).

4785221782591 is a wasteful number, since it uses less digits than its factorization.

4785221782591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285042.

The product of its digits is 22579200, while the sum is 61.

The spelling of 4785221782591 in words is "four trillion, seven hundred eighty-five billion, two hundred twenty-one million, seven hundred eighty-two thousand, five hundred ninety-one".