56439909006 has 64 divisors (see below), whose sum is σ = 125828161536. Its totient is φ = 16759872000.

The previous prime is 56439908963. The next prime is 56439909023. The reversal of 56439909006 is 60090993465.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 56439909006.

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, 855606 + ... + 919206.

It is an arithmetic number, because the mean of its divisors is an integer number (1966065024).

Almost surely, 2^56439909006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56439909006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62914080768).

56439909006 is an abundant number, since it is smaller than the sum of its proper divisors (69388252530).

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

56439909006 is a wasteful number, since it uses less digits than its factorization.

56439909006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64017.

The product of its (nonzero) digits is 1574640, while the sum is 51.

The spelling of 56439909006 in words is "fifty-six billion, four hundred thirty-nine million, nine hundred nine thousand, six".