740609984569 has 63 divisors (see below), whose sum is σ = 940494434733. Its totient is φ = 582940979712.

The previous prime is 740609984567. The next prime is 740609984581. The reversal of 740609984569 is 965489906047.

The square root of 740609984569 is 860587.

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

It can be written as a sum of positive squares in 4 ways, for example, as 279378844969 + 461231139600 = 528563^2 + 679140^2 .

It is not a de Polignac number, because 740609984569 - 2¹ = 740609984567 is a prime.

It is a super-2 number, since 2×740609984569² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (740609984563) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 3837357337 + ... + 3837357529.

It is an arithmetic number, because the mean of its divisors is an integer number (14928483091).

Almost surely, 2^740609984569 is an apocalyptic number.

740609984569 is the 860587-th square number.

740609984569 is the 430294-th centered octagonal number.

It is an amenable number.

740609984569 is a deficient number, since it is larger than the sum of its proper divisors (199884450164).

740609984569 is an frugal number, since it uses more digits than its factorization.

740609984569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 67.

The spelling of 740609984569 in words is "seven hundred forty billion, six hundred nine million, nine hundred eighty-four thousand, five hundred sixty-nine".