709742868021 has 12 divisors (see below), whose sum is σ = 1118382701280. Its totient is φ = 430147192680.

The previous prime is 709742867957. The next prime is 709742868053. The reversal of 709742868021 is 120868247907.

It is a happy number.

709742868021 is a `hidden beast` number, since 70 + 97 + 428 + 68 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 709742868021 - 2⁶ = 709742867957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709742863021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3584559841 + ... + 3584560038.

It is an arithmetic number, because the mean of its divisors is an integer number (93198558440).

Almost surely, 2^709742868021 is an apocalyptic number.

It is an amenable number.

709742868021 is a deficient number, since it is larger than the sum of its proper divisors (408639833259).

709742868021 is a wasteful number, since it uses less digits than its factorization.

709742868021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7169119896 (or 7169119893 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 709742868021 in words is "seven hundred nine billion, seven hundred forty-two million, eight hundred sixty-eight thousand, twenty-one".