14640401665 has 16 divisors (see below), whose sum is σ = 17711168400. Its totient is φ = 11617581312.

The previous prime is 14640401663. The next prime is 14640401707. The reversal of 14640401665 is 56610404641.

It can be written as a sum of positive squares in 8 ways, for example, as 1321395201 + 13319006464 = 36351^2 + 115408^2 .

It is a cyclic number.

It is not a de Polignac number, because 14640401665 - 2¹ = 14640401663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14640401663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284239 + ... + 331771.

It is an arithmetic number, because the mean of its divisors is an integer number (1106948025).

Almost surely, 2^14640401665 is an apocalyptic number.

It is an amenable number.

14640401665 is a deficient number, since it is larger than the sum of its proper divisors (3070766735).

14640401665 is a wasteful number, since it uses less digits than its factorization.

14640401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48036.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 14640401665 in words is "fourteen billion, six hundred forty million, four hundred one thousand, six hundred sixty-five".