39855598794 has 72 divisors (see below), whose sum is σ = 94964425920. Its totient is φ = 12071524080.

The previous prime is 39855598793. The next prime is 39855598823. The reversal of 39855598794 is 49789555893.

It is not an unprimeable number, because it can be changed into a prime (39855598793) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6790249 + ... + 6796115.

It is an arithmetic number, because the mean of its divisors is an integer number (1318950360).

Almost surely, 2^39855598794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39855598794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47482212960).

39855598794 is an abundant number, since it is smaller than the sum of its proper divisors (55108827126).

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

39855598794 is a wasteful number, since it uses less digits than its factorization.

39855598794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9016 (or 9002 counting only the distinct ones).

The product of its digits is 489888000, while the sum is 72.

The spelling of 39855598794 in words is "thirty-nine billion, eight hundred fifty-five million, five hundred ninety-eight thousand, seven hundred ninety-four".