15671124881 has 4 divisors (see below), whose sum is σ = 15672183732. Its totient is φ = 15670066032.

The previous prime is 15671124871. The next prime is 15671124941. The reversal of 15671124881 is 18842117651.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13876840000 + 1794284881 = 117800^2 + 42359^2 .

It is a cyclic number.

It is not a de Polignac number, because 15671124881 - 2²² = 15666930577 is a prime.

It is a super-2 number, since 2×15671124881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15671124871) 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, 506906 + ... + 536931.

It is an arithmetic number, because the mean of its divisors is an integer number (3918045933).

Almost surely, 2^15671124881 is an apocalyptic number.

It is an amenable number.

15671124881 is a deficient number, since it is larger than the sum of its proper divisors (1058851).

15671124881 is a wasteful number, since it uses less digits than its factorization.

15671124881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058850.

The product of its digits is 107520, while the sum is 44.

The spelling of 15671124881 in words is "fifteen billion, six hundred seventy-one million, one hundred twenty-four thousand, eight hundred eighty-one".