15242278161 has 12 divisors (see below), whose sum is σ = 22338545936. Its totient is φ = 9237744120.

The previous prime is 15242278159. The next prime is 15242278187. The reversal of 15242278161 is 16187224251.

It is not a de Polignac number, because 15242278161 - 2¹ = 15242278159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15242278141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20994511 + ... + 20995236.

Almost surely, 2^15242278161 is an apocalyptic number.

15242278161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15242278161 is a deficient number, since it is larger than the sum of its proper divisors (7096267775).

15242278161 is a wasteful number, since it uses less digits than its factorization.

15242278161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41989772 (or 41989761 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The spelling of 15242278161 in words is "fifteen billion, two hundred forty-two million, two hundred seventy-eight thousand, one hundred sixty-one".