140518988609 has 4 divisors (see below), whose sum is σ = 140520431616. Its totient is φ = 140517545604.

The previous prime is 140518988587. The next prime is 140518988633. The reversal of 140518988609 is 906889815041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140518988609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140518988639) 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, 563969 + ... + 774014.

It is an arithmetic number, because the mean of its divisors is an integer number (35130107904).

Almost surely, 2^140518988609 is an apocalyptic number.

It is an amenable number.

140518988609 is a deficient number, since it is larger than the sum of its proper divisors (1443007).

140518988609 is a wasteful number, since it uses less digits than its factorization.

140518988609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443006.

The product of its (nonzero) digits is 4976640, while the sum is 59.

The spelling of 140518988609 in words is "one hundred forty billion, five hundred eighteen million, nine hundred eighty-eight thousand, six hundred nine".