1680629864 has 16 divisors (see below), whose sum is σ = 3153158820. Its totient is φ = 839787520.

The previous prime is 1680629851. The next prime is 1680629969. The reversal of 1680629864 is 4689260861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1658932900 + 21696964 = 40730^2 + 4658^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52217 + ... + 78024.

Almost surely, 2^1680629864 is an apocalyptic number.

It is an amenable number.

1680629864 is a deficient number, since it is larger than the sum of its proper divisors (1472528956).

1680629864 is a wasteful number, since it uses less digits than its factorization.

1680629864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131860 (or 131856 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 1680629864 is about 40995.4858978400. The cubic root of 1680629864 is about 1188.9329379603.

The spelling of 1680629864 in words is "one billion, six hundred eighty million, six hundred twenty-nine thousand, eight hundred sixty-four".