14400401665 has 16 divisors (see below), whose sum is σ = 19112719248. Its totient is φ = 10346731776.

The previous prime is 14400401657. The next prime is 14400401671. The reversal of 14400401665 is 56610400441.

It can be written as a sum of positive squares in 8 ways, for example, as 374499904 + 14025901761 = 19352^2 + 118431^2 .

It is a cyclic number.

It is not a de Polignac number, because 14400401665 - 2³ = 14400401657 is a prime.

It is a super-2 number, since 2×14400401665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991442 + ... + 2996251.

It is an arithmetic number, because the mean of its divisors is an integer number (1194544953).

Almost surely, 2^14400401665 is an apocalyptic number.

It is an amenable number.

14400401665 is a deficient number, since it is larger than the sum of its proper divisors (4712317583).

14400401665 is a wasteful number, since it uses less digits than its factorization.

14400401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5987748.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 14400401665 in words is "fourteen billion, four hundred million, four hundred one thousand, six hundred sixty-five".