1680348451 has 4 divisors (see below), whose sum is σ = 1725763312. Its totient is φ = 1634933592.

The previous prime is 1680348443. The next prime is 1680348457. The reversal of 1680348451 is 1548430861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1680348451 - 2³ = 1680348443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680348457) by changing a digit.

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, 22707375 + ... + 22707448.

It is an arithmetic number, because the mean of its divisors is an integer number (431440828).

Almost surely, 2^1680348451 is an apocalyptic number.

1680348451 is a deficient number, since it is larger than the sum of its proper divisors (45414861).

1680348451 is an equidigital number, since it uses as much as digits as its factorization.

1680348451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45414860.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 1680348451 is about 40992.0535104061. The cubic root of 1680348451 is about 1188.8665739800.

The spelling of 1680348451 in words is "one billion, six hundred eighty million, three hundred forty-eight thousand, four hundred fifty-one".