139894379586 has 120 divisors (see below), whose sum is σ = 348611154804. Its totient is φ = 41880758400.

The previous prime is 139894379579. The next prime is 139894379587. The reversal of 139894379586 is 685973498931.

139894379586 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 9 + 4 + 37 + 9 + 586 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 17481863961 + 122412515625 = 132219^2 + 349875^2 .

It is not an unprimeable number, because it can be changed into a prime (139894379587) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 943936 + ... + 1082036.

Almost surely, 2^139894379586 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139894379586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174305577402).

139894379586 is an abundant number, since it is smaller than the sum of its proper divisors (208716775218).

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

139894379586 is a wasteful number, since it uses less digits than its factorization.

139894379586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138178 (or 138156 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 72.

The spelling of 139894379586 in words is "one hundred thirty-nine billion, eight hundred ninety-four million, three hundred seventy-nine thousand, five hundred eighty-six".