74440028569 has 9 divisors (see below), whose sum is σ = 74806603221. Its totient is φ = 74075245500.

The previous prime is 74440028567. The next prime is 74440028581. The reversal of 74440028569 is 96582004447.

The square root of 74440028569 is 272837.

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

It is not a de Polignac number, because 74440028569 - 2¹ = 74440028567 is a prime.

It is a super-2 number, since 2×74440028569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74440028561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 68481544 + ... + 68482630.

Almost surely, 2^74440028569 is an apocalyptic number.

74440028569 is the 272837-th square number.

74440028569 is the 136419-th centered octagonal number.

It is an amenable number.

74440028569 is a deficient number, since it is larger than the sum of its proper divisors (366574652).

74440028569 is an frugal number, since it uses more digits than its factorization.

74440028569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676 (or 1338 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

Multiplying 74440028569 by its sum of digits (49), we get a square (3647561399881 = 1909859²).

The spelling of 74440028569 in words is "seventy-four billion, four hundred forty million, twenty-eight thousand, five hundred sixty-nine".