139897825566 has 16 divisors (see below), whose sum is σ = 281648604288. Its totient is φ = 46323783000.

The previous prime is 139897825559. The next prime is 139897825577. The reversal of 139897825566 is 665528798931.

It is a self number, because there is not a number n which added to its sum of digits gives 139897825566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77205400 + ... + 77207211.

It is an arithmetic number, because the mean of its divisors is an integer number (17603037768).

Almost surely, 2^139897825566 is an apocalyptic number.

139897825566 is an abundant number, since it is smaller than the sum of its proper divisors (141750778722).

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

139897825566 is a wasteful number, since it uses less digits than its factorization.

139897825566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154412767.

The product of its digits is 195955200, while the sum is 69.

The spelling of 139897825566 in words is "one hundred thirty-nine billion, eight hundred ninety-seven million, eight hundred twenty-five thousand, five hundred sixty-six".