139240645709 has 8 divisors (see below), whose sum is σ = 152384189952. Its totient is φ = 126177985440.

The previous prime is 139240645697. The next prime is 139240645717. The reversal of 139240645709 is 907546042931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139240645709 - 2¹² = 139240641613 is a prime.

It is a super-2 number, since 2×139240645709² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139240645729) 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 7 ways as a sum of consecutive naturals, for example, 20217389 + ... + 20224274.

It is an arithmetic number, because the mean of its divisors is an integer number (19048023744).

Almost surely, 2^139240645709 is an apocalyptic number.

It is an amenable number.

139240645709 is a deficient number, since it is larger than the sum of its proper divisors (13143544243).

139240645709 is a wasteful number, since it uses less digits than its factorization.

139240645709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40441987.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 139240645709 in words is "one hundred thirty-nine billion, two hundred forty million, six hundred forty-five thousand, seven hundred nine".