140064400565 has 8 divisors (see below), whose sum is σ = 168190168920. Its totient is φ = 111976261632.

The previous prime is 140064400559. The next prime is 140064400607. The reversal of 140064400565 is 565004460041.

It can be written as a sum of positive squares in 4 ways, for example, as 36615970609 + 103448429956 = 191353^2 + 321634^2 .

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 140064400565 - 2¹⁶ = 140064335029 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9399164 + ... + 9414053.

It is an arithmetic number, because the mean of its divisors is an integer number (21023771115).

Almost surely, 2^140064400565 is an apocalyptic number.

It is an amenable number.

140064400565 is a deficient number, since it is larger than the sum of its proper divisors (28125768355).

140064400565 is a wasteful number, since it uses less digits than its factorization.

140064400565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18814711.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 140064400565 in words is "one hundred forty billion, sixty-four million, four hundred thousand, five hundred sixty-five".