140012043661 has 4 divisors (see below), whose sum is σ = 160013764192. Its totient is φ = 120010323132.

The previous prime is 140012043653. The next prime is 140012043667. The reversal of 140012043661 is 166340210041.

140012043661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 140012043661 - 2³ = 140012043653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140012043667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10000860255 + ... + 10000860268.

It is an arithmetic number, because the mean of its divisors is an integer number (40003441048).

Almost surely, 2^140012043661 is an apocalyptic number.

It is an amenable number.

140012043661 is a deficient number, since it is larger than the sum of its proper divisors (20001720531).

140012043661 is an equidigital number, since it uses as much as digits as its factorization.

140012043661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20001720530.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 140012043661 in words is "one hundred forty billion, twelve million, forty-three thousand, six hundred sixty-one".