15673228861 has 4 divisors (see below), whose sum is σ = 15677458300. Its totient is φ = 15668999424.

The previous prime is 15673228853. The next prime is 15673228891. The reversal of 15673228861 is 16882237651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16882237651 = 17 ⋅993072803.

It can be written as a sum of positive squares in 2 ways, for example, as 11525096025 + 4148132836 = 107355^2 + 64406^2 .

It is a cyclic number.

It is not a de Polignac number, because 15673228861 - 2³ = 15673228853 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 (15673228811) 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, 2109156 + ... + 2116573.

It is an arithmetic number, because the mean of its divisors is an integer number (3919364575).

Almost surely, 2^15673228861 is an apocalyptic number.

It is an amenable number.

15673228861 is a deficient number, since it is larger than the sum of its proper divisors (4229439).

15673228861 is an equidigital number, since it uses as much as digits as its factorization.

15673228861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4229438.

The product of its digits is 967680, while the sum is 49.

The spelling of 15673228861 in words is "fifteen billion, six hundred seventy-three million, two hundred twenty-eight thousand, eight hundred sixty-one".