709209007128 has 32 divisors (see below), whose sum is σ = 1970025020400. Its totient is φ = 236403002304.

The previous prime is 709209007009. The next prime is 709209007193. The reversal of 709209007128 is 821700902907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1641687301 + ... + 1641687732.

Almost surely, 2^709209007128 is an apocalyptic number.

It is an amenable number.

709209007128 is an abundant number, since it is smaller than the sum of its proper divisors (1260816013272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

709209007128 is a wasteful number, since it uses less digits than its factorization.

709209007128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283375048 (or 3283375038 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 709209007128 in words is "seven hundred nine billion, two hundred nine million, seven thousand, one hundred twenty-eight".