16478886931 has 4 divisors (see below), whose sum is σ = 17746493632. Its totient is φ = 15211280232.

The previous prime is 16478886917. The next prime is 16478886943. The reversal of 16478886931 is 13968887461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13968887461 = 3659 ⋅3817679.

It is a cyclic number.

It is not a de Polignac number, because 16478886931 - 2⁵ = 16478886899 is a prime.

It is a super-2 number, since 2×16478886931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16478886931.

It is not an unprimeable number, because it can be changed into a prime (16478886731) 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, 633803331 + ... + 633803356.

It is an arithmetic number, because the mean of its divisors is an integer number (4436623408).

Almost surely, 2^16478886931 is an apocalyptic number.

16478886931 is a deficient number, since it is larger than the sum of its proper divisors (1267606701).

16478886931 is a wasteful number, since it uses less digits than its factorization.

16478886931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267606700.

The product of its digits is 13934592, while the sum is 61.

The spelling of 16478886931 in words is "sixteen billion, four hundred seventy-eight million, eight hundred eighty-six thousand, nine hundred thirty-one".