1681960992 has 24 divisors (see below), whose sum is σ = 4415147856. Its totient is φ = 560653632.

The previous prime is 1681960957. The next prime is 1681960993. The reversal of 1681960992 is 2990691861.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1681960993) 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, 8760118 + ... + 8760309.

It is an arithmetic number, because the mean of its divisors is an integer number (183964494).

Almost surely, 2^1681960992 is an apocalyptic number.

1681960992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1681960992 is an abundant number, since it is smaller than the sum of its proper divisors (2733186864).

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

1681960992 is a wasteful number, since it uses less digits than its factorization.

1681960992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17520440 (or 17520432 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 1681960992 is about 41011.7177401776. The cubic root of 1681960992 is about 1189.2467497256.

The spelling of 1681960992 in words is "one billion, six hundred eighty-one million, nine hundred sixty thousand, nine hundred ninety-two".