139765639640 has 128 divisors (see below), whose sum is σ = 360928249920. Its totient is φ = 48243916800.

The previous prime is 139765639639. The next prime is 139765639649. The reversal of 139765639640 is 46936567931.

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 139765639640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139765639649) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 562784 + ... + 772176.

Almost surely, 2^139765639640 is an apocalyptic number.

139765639640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139765639640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180464124960).

139765639640 is an abundant number, since it is smaller than the sum of its proper divisors (221162610280).

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

139765639640 is a wasteful number, since it uses less digits than its factorization.

139765639640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209493 (or 209489 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 59.

The spelling of 139765639640 in words is "one hundred thirty-nine billion, seven hundred sixty-five million, six hundred thirty-nine thousand, six hundred forty".