1680495901 has 8 divisors (see below), whose sum is σ = 1920819200. Its totient is φ = 1440235728.

The previous prime is 1680495863. The next prime is 1680495911. The reversal of 1680495901 is 1095940861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1680495901 - 2⁹ = 1680495389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680495911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80215 + ... + 98971.

It is an arithmetic number, because the mean of its divisors is an integer number (240102400).

Almost surely, 2^1680495901 is an apocalyptic number.

It is an amenable number.

1680495901 is a deficient number, since it is larger than the sum of its proper divisors (240323299).

1680495901 is a wasteful number, since it uses less digits than its factorization.

1680495901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31563.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 1680495901 is about 40993.8519902680. The cubic root of 1680495901 is about 1188.9013471742.

The spelling of 1680495901 in words is "one billion, six hundred eighty million, four hundred ninety-five thousand, nine hundred one".