740981804809 has 9 divisors (see below), whose sum is σ = 745696798119. Its totient is φ = 736296454080.

The previous prime is 740981804791. The next prime is 740981804887. The reversal of 740981804809 is 908408189047.

The square root of 740981804809 is 860803.

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

It can be written as a sum of positive squares in only one way, i.e., 97841963209 + 643139841600 = 312797^2 + 801960^2 .

It is not a de Polignac number, because 740981804809 - 2¹³ = 740981796617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (740981004809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 140308249 + ... + 140313529.

It is an arithmetic number, because the mean of its divisors is an integer number (82855199791).

Almost surely, 2^740981804809 is an apocalyptic number.

740981804809 is the 860803-rd square number.

740981804809 is the 430402-nd centered octagonal number.

It is an amenable number.

740981804809 is a deficient number, since it is larger than the sum of its proper divisors (4714993310).

740981804809 is an frugal number, since it uses more digits than its factorization.

740981804809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10888 (or 5444 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 740981804809 in words is "seven hundred forty billion, nine hundred eighty-one million, eight hundred four thousand, eight hundred nine".