1681943036 has 6 divisors (see below), whose sum is σ = 2943400320. Its totient is φ = 840971516.

The previous prime is 1681943033. The next prime is 1681943051. The reversal of 1681943036 is 6303491861.

It is a junction number, because it is equal to n+sod(n) for n = 1681942984 and 1681943002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681943033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210242876 + ... + 210242883.

It is an arithmetic number, because the mean of its divisors is an integer number (490566720).

Almost surely, 2^1681943036 is an apocalyptic number.

It is an amenable number.

1681943036 is a deficient number, since it is larger than the sum of its proper divisors (1261457284).

1681943036 is a wasteful number, since it uses less digits than its factorization.

1681943036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420485763 (or 420485761 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 1681943036 is about 41011.4988265486. The cubic root of 1681943036 is about 1189.2425177229.

The spelling of 1681943036 in words is "one billion, six hundred eighty-one million, nine hundred forty-three thousand, thirty-six".