709989575640 has 256 divisors, whose sum is σ = 2264613120000. Its totient is φ = 177762428928.

The previous prime is 709989575629. The next prime is 709989575653. The reversal of 709989575640 is 46575989907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34257201 + ... + 34277919.

It is an arithmetic number, because the mean of its divisors is an integer number (8846145000).

Almost surely, 2^709989575640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 709989575640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132306560000).

709989575640 is an abundant number, since it is smaller than the sum of its proper divisors (1554623544360).

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

709989575640 is a wasteful number, since it uses less digits than its factorization.

709989575640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21034 (or 21030 counting only the distinct ones).

The product of its (nonzero) digits is 171460800, while the sum is 69.

The spelling of 709989575640 in words is "seven hundred nine billion, nine hundred eighty-nine million, five hundred seventy-five thousand, six hundred forty".