74720569 has 16 divisors (see below), whose sum is σ = 93456000. Its totient is φ = 58037760.

The previous prime is 74720563. The next prime is 74720579. The reversal of 74720569 is 96502747.

It is not a de Polignac number, because 74720569 - 2¹⁵ = 74687801 is a prime.

It is a super-2 number, since 2×74720569² = 11166326863367522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74720563) 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, 25807 + ... + 28555.

It is an arithmetic number, because the mean of its divisors is an integer number (5841000).

Almost surely, 2^74720569 is an apocalyptic number.

It is an amenable number.

74720569 is a deficient number, since it is larger than the sum of its proper divisors (18735431).

74720569 is a wasteful number, since it uses less digits than its factorization.

74720569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 74720569 is about 8644.1060266519. The cubic root of 74720569 is about 421.1919447917.

It can be divided in two parts, 747 and 20569, that added together give a square (21316 = 146²).

The spelling of 74720569 in words is "seventy-four million, seven hundred twenty thousand, five hundred sixty-nine".