1671826816 has 64 divisors (see below), whose sum is σ = 3671130960. Its totient is φ = 752025600.

The previous prime is 1671826729. The next prime is 1671826837. The reversal of 1671826816 is 6186281761.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130456 + ... + 142696.

Almost surely, 2^1671826816 is an apocalyptic number.

1671826816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1671826816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1835565480).

1671826816 is an abundant number, since it is smaller than the sum of its proper divisors (1999304144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1671826816 is a wasteful number, since it uses less digits than its factorization.

1671826816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12363 (or 12351 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 1671826816 is about 40887.9788691004. The cubic root of 1671826816 is about 1186.8534475732.

It can be divided in two parts, 16718 and 26816, that added together give a palindrome (43534).

The spelling of 1671826816 in words is "one billion, six hundred seventy-one million, eight hundred twenty-six thousand, eight hundred sixteen".