74823584521 has 27 divisors (see below), whose sum is σ = 91042135821. Its totient is φ = 61309937304.

The previous prime is 74823584503. The next prime is 74823584587. The reversal of 74823584521 is 12548532847.

The square root of 74823584521 is 273539.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 74823584521 - 2⁵ = 74823584489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (74823584621) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 44038930 + ... + 44040628.

Almost surely, 2^74823584521 is an apocalyptic number.

74823584521 is the 273539-th square number.

74823584521 is the 136770-th centered octagonal number.

It is an amenable number.

74823584521 is a deficient number, since it is larger than the sum of its proper divisors (16218551300).

74823584521 is an frugal number, since it uses more digits than its factorization.

74823584521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458 (or 1729 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 49.

Multiplying 74823584521 by its sum of digits (49), we get a square (3666355641529 = 1914773²).

74823584521 divided by its sum of digits (49) gives a square (1527011929 = 39077²).

It can be divided in two parts, 74823 and 584521, that added together give a square (659344 = 812²).

The spelling of 74823584521 in words is "seventy-four billion, eight hundred twenty-three million, five hundred eighty-four thousand, five hundred twenty-one".