709686050640 has 160 divisors (see below), whose sum is σ = 2516230379520. Its totient is φ = 162090465792.

The previous prime is 709686050599. The next prime is 709686050669. The reversal of 709686050640 is 46050686907.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2055787 + ... + 2376053.

It is an arithmetic number, because the mean of its divisors is an integer number (15726439872).

Almost surely, 2^709686050640 is an apocalyptic number.

709686050640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 709686050640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258115189760).

709686050640 is an abundant number, since it is smaller than the sum of its proper divisors (1806544328880).

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

709686050640 is a wasteful number, since it uses less digits than its factorization.

709686050640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321609 (or 321603 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 709686050640 in words is "seven hundred nine billion, six hundred eighty-six million, fifty thousand, six hundred forty".