139733240639 has 4 divisors (see below), whose sum is σ = 140230512240. Its totient is φ = 139235969040.

The previous prime is 139733240617. The next prime is 139733240657. The reversal of 139733240639 is 936042337931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139733240639 is a prime.

It is a super-2 number, since 2×139733240639² (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 (139733242639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248635379 + ... + 248635940.

It is an arithmetic number, because the mean of its divisors is an integer number (35057628060).

Almost surely, 2^139733240639 is an apocalyptic number.

139733240639 is a deficient number, since it is larger than the sum of its proper divisors (497271601).

139733240639 is an equidigital number, since it uses as much as digits as its factorization.

139733240639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497271600.

The product of its (nonzero) digits is 2204496, while the sum is 50.

The spelling of 139733240639 in words is "one hundred thirty-nine billion, seven hundred thirty-three million, two hundred forty thousand, six hundred thirty-nine".