709297329661 has 16 divisors (see below), whose sum is σ = 777069426240. Its totient is φ = 644428512000.

The previous prime is 709297329641. The next prime is 709297329673. The reversal of 709297329661 is 166923792907.

It is a cyclic number.

It is not a de Polignac number, because 709297329661 - 2²¹ = 709295232509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 709297329661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709297329641) 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, 2439286 + ... + 2714536.

It is an arithmetic number, because the mean of its divisors is an integer number (48566839140).

Almost surely, 2^709297329661 is an apocalyptic number.

It is an amenable number.

709297329661 is a deficient number, since it is larger than the sum of its proper divisors (67772096579).

709297329661 is a wasteful number, since it uses less digits than its factorization.

709297329661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280524.

The product of its (nonzero) digits is 15431472, while the sum is 61.

The spelling of 709297329661 in words is "seven hundred nine billion, two hundred ninety-seven million, three hundred twenty-nine thousand, six hundred sixty-one".