139781690742 has 32 divisors (see below), whose sum is σ = 286127918208. Its totient is φ = 45500285376.

The previous prime is 139781690731. The next prime is 139781690743. The reversal of 139781690742 is 247096187931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139781690743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1161178 + ... + 1275890.

It is an arithmetic number, because the mean of its divisors is an integer number (8941497444).

Almost surely, 2^139781690742 is an apocalyptic number.

139781690742 is an abundant number, since it is smaller than the sum of its proper divisors (146346227466).

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

139781690742 is a wasteful number, since it uses less digits than its factorization.

139781690742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119484.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 139781690742 in words is "one hundred thirty-nine billion, seven hundred eighty-one million, six hundred ninety thousand, seven hundred forty-two".