140806814669 has 8 divisors (see below), whose sum is σ = 141422736312. Its totient is φ = 140190992640.

The previous prime is 140806814633. The next prime is 140806814689. The reversal of 140806814669 is 966418608041.

It can be written as a sum of positive squares in 4 ways, for example, as 29141904100 + 111664910569 = 170710^2 + 334163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-140806814669 is a prime.

It is a super-2 number, since 2×140806814669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140806814669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140806814609) 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, 5021849 + ... + 5049809.

It is an arithmetic number, because the mean of its divisors is an integer number (17677842039).

Almost surely, 2^140806814669 is an apocalyptic number.

It is an amenable number.

140806814669 is a deficient number, since it is larger than the sum of its proper divisors (615921643).

140806814669 is a wasteful number, since it uses less digits than its factorization.

140806814669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49807.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 140806814669 in words is "one hundred forty billion, eight hundred six million, eight hundred fourteen thousand, six hundred sixty-nine".