1721010680 has 16 divisors (see below), whose sum is σ = 3872274120. Its totient is φ = 688404256.

The previous prime is 1721010659. The next prime is 1721010737. The reversal of 1721010680 is 860101271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21512594 + ... + 21512673.

Almost surely, 2^1721010680 is an apocalyptic number.

1721010680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1721010680 is an abundant number, since it is smaller than the sum of its proper divisors (2151263440).

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

1721010680 is a wasteful number, since it uses less digits than its factorization.

1721010680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43025278 (or 43025274 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1721010680 is about 41485.0657466033. The cubic root of 1721010680 is about 1198.3799156083.

The spelling of 1721010680 in words is "one billion, seven hundred twenty-one million, ten thousand, six hundred eighty".