140243040661 has 8 divisors (see below), whose sum is σ = 147708235584. Its totient is φ = 132891818400.

The previous prime is 140243040631. The next prime is 140243040713. The reversal of 140243040661 is 166040342041.

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 140243040661 - 2⁵ = 140243040629 is a prime.

It is a super-2 number, since 2×140243040661² (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 (140243040601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28490640 + ... + 28495561.

It is an arithmetic number, because the mean of its divisors is an integer number (18463529448).

Almost surely, 2^140243040661 is an apocalyptic number.

It is an amenable number.

140243040661 is a deficient number, since it is larger than the sum of its proper divisors (7465194923).

140243040661 is a wasteful number, since it uses less digits than its factorization.

140243040661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56986331.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 140243040661 in words is "one hundred forty billion, two hundred forty-three million, forty thousand, six hundred sixty-one".