1808196544 has 56 divisors (see below), whose sum is σ = 4473537408. Its totient is φ = 704490240.

The previous prime is 1808196539. The next prime is 1808196557. The reversal of 1808196544 is 4456918081.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 1808196494 and 1808196503.

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, 178534 + ... + 188389.

Almost surely, 2^1808196544 is an apocalyptic number.

1808196544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1808196544 is an abundant number, since it is smaller than the sum of its proper divisors (2665340864).

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

1808196544 is a wasteful number, since it uses less digits than its factorization.

1808196544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366953 (or 366943 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 1808196544 is about 42522.8943511610. The cubic root of 1808196544 is about 1218.2840123100.

The spelling of 1808196544 in words is "one billion, eight hundred eight million, one hundred ninety-six thousand, five hundred forty-four".