709369902081 has 27 divisors (see below), whose sum is σ = 1049189235939. Its totient is φ = 461844536832.

The previous prime is 709369902079. The next prime is 709369902107. The reversal of 709369902081 is 180209963907.

The square root of 709369902081 is 842241.

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

709369902081 is a `hidden beast` number, since 70 + 9 + 369 + 9 + 0 + 208 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61409300481 + 647960601600 = 247809^2 + 804960^2 .

It is not a de Polignac number, because 709369902081 - 2¹ = 709369902079 is a prime.

It is a super-2 number, since 2×709369902081² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (709369902011) 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, 108645825 + ... + 108652353.

Almost surely, 2^709369902081 is an apocalyptic number.

709369902081 is the 842241-st square number.

709369902081 is the 421121-st centered octagonal number.

It is an amenable number.

709369902081 is a deficient number, since it is larger than the sum of its proper divisors (339819333858).

709369902081 is an frugal number, since it uses more digits than its factorization.

709369902081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13150 (or 6575 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 709369902081 in words is "seven hundred nine billion, three hundred sixty-nine million, nine hundred two thousand, eighty-one".