1681395376 has 20 divisors (see below), whose sum is σ = 3268188144. Its totient is φ = 837992000.

The previous prime is 1681395371. The next prime is 1681395389. The reversal of 1681395376 is 6735931861.

It is not an unprimeable number, because it can be changed into a prime (1681395371) 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, 163975 + ... + 173926.

Almost surely, 2^1681395376 is an apocalyptic number.

1681395376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1681395376 is a deficient number, since it is larger than the sum of its proper divisors (1586792768).

1681395376 is a wasteful number, since it uses less digits than its factorization.

1681395376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338220 (or 338214 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 1681395376 is about 41004.8213750530. The cubic root of 1681395376 is about 1189.1134266961.

The spelling of 1681395376 in words is "one billion, six hundred eighty-one million, three hundred ninety-five thousand, three hundred seventy-six".