13161150661 has 8 divisors (see below), whose sum is σ = 13970444760. Its totient is φ = 12355757568.

The previous prime is 13161150631. The next prime is 13161150677. The reversal of 13161150661 is 16605116131.

It can be written as a sum of positive squares in 4 ways, for example, as 6653501761 + 6507648900 = 81569^2 + 80670^2 .

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 13161150661 - 2¹³ = 13161142469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161150631) 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, 968296 + ... + 981793.

It is an arithmetic number, because the mean of its divisors is an integer number (1746305595).

Almost surely, 2^13161150661 is an apocalyptic number.

It is an amenable number.

13161150661 is a deficient number, since it is larger than the sum of its proper divisors (809294099).

13161150661 is a wasteful number, since it uses less digits than its factorization.

13161150661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950503.

The product of its (nonzero) digits is 3240, while the sum is 31.

Adding to 13161150661 its reverse (16605116131), we get a palindrome (29766266792).

The spelling of 13161150661 in words is "thirteen billion, one hundred sixty-one million, one hundred fifty thousand, six hundred sixty-one".