1813229616 has 40 divisors (see below), whose sum is σ = 5110012224. Its totient is φ = 549463360.

The previous prime is 1813229549. The next prime is 1813229629. The reversal of 1813229616 is 6169223181.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 1716546 + ... + 1717601.

Almost surely, 2^1813229616 is an apocalyptic number.

1813229616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1813229616 is an abundant number, since it is smaller than the sum of its proper divisors (3296782608).

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

1813229616 is a wasteful number, since it uses less digits than its factorization.

1813229616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434169 (or 3434163 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 1813229616 is about 42582.0339579969. The cubic root of 1813229616 is about 1219.4133199978.

The spelling of 1813229616 in words is "one billion, eight hundred thirteen million, two hundred twenty-nine thousand, six hundred sixteen".