15547667161 has 4 divisors (see below), whose sum is σ = 16743641572. Its totient is φ = 14351692752.

The previous prime is 15547667141. The next prime is 15547667227. The reversal of 15547667161 is 16176674551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16176674551 = 54563 ⋅296477.

It can be written as a sum of positive squares in 2 ways, for example, as 965655625 + 14582011536 = 31075^2 + 120756^2 .

It is a cyclic number.

It is not a de Polignac number, because 15547667161 - 2¹⁷ = 15547536089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15547667131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597987186 + ... + 597987211.

It is an arithmetic number, because the mean of its divisors is an integer number (4185910393).

Almost surely, 2^15547667161 is an apocalyptic number.

It is an amenable number.

15547667161 is a deficient number, since it is larger than the sum of its proper divisors (1195974411).

15547667161 is a wasteful number, since it uses less digits than its factorization.

15547667161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195974410.

The product of its digits is 1058400, while the sum is 49.

The spelling of 15547667161 in words is "fifteen billion, five hundred forty-seven million, six hundred sixty-seven thousand, one hundred sixty-one".