13738001665 has 8 divisors (see below), whose sum is σ = 17455343400. Its totient is φ = 10343907072.

The previous prime is 13738001647. The next prime is 13738001681. The reversal of 13738001665 is 56610083731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4920040449 + 8817961216 = 70143^2 + 93904^2 .

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 13738001665 - 2⁹ = 13738001153 is a prime.

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, 80811690 + ... + 80811859.

It is an arithmetic number, because the mean of its divisors is an integer number (2181917925).

Almost surely, 2^13738001665 is an apocalyptic number.

It is an amenable number.

13738001665 is a deficient number, since it is larger than the sum of its proper divisors (3717341735).

13738001665 is a wasteful number, since it uses less digits than its factorization.

13738001665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161623571.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 13738001665 in words is "thirteen billion, seven hundred thirty-eight million, one thousand, six hundred sixty-five".