140561640631 has 8 divisors (see below), whose sum is σ = 143251434144. Its totient is φ = 137873243040.

The previous prime is 140561640559. The next prime is 140561640641. The reversal of 140561640631 is 136046165041.

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 140561640631 - 2¹⁷ = 140561509559 is a prime.

It is a super-2 number, since 2×140561640631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140561640641) 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, 144531 + ... + 549556.

It is an arithmetic number, because the mean of its divisors is an integer number (17906429268).

Almost surely, 2^140561640631 is an apocalyptic number.

140561640631 is a deficient number, since it is larger than the sum of its proper divisors (2689793513).

140561640631 is an equidigital number, since it uses as much as digits as its factorization.

140561640631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697961.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 140561640631 in words is "one hundred forty billion, five hundred sixty-one million, six hundred forty thousand, six hundred thirty-one".