1680482578 has 4 divisors (see below), whose sum is σ = 2520723870. Its totient is φ = 840241288.

The previous prime is 1680482561. The next prime is 1680482579. The reversal of 1680482578 is 8752840861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8752840861 = 293 ⋅29873177.

It can be written as a sum of positive squares in only one way, i.e., 1463598049 + 216884529 = 38257^2 + 14727^2 .

It is not an unprimeable number, because it can be changed into a prime (1680482579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420120643 + ... + 420120646.

Almost surely, 2^1680482578 is an apocalyptic number.

1680482578 is a deficient number, since it is larger than the sum of its proper divisors (840241292).

1680482578 is an equidigital number, since it uses as much as digits as its factorization.

1680482578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840241291.

The product of its (nonzero) digits is 860160, while the sum is 49.

The square root of 1680482578 is about 40993.6894899691. The cubic root of 1680482578 is about 1188.8982052893.

The spelling of 1680482578 in words is "one billion, six hundred eighty million, four hundred eighty-two thousand, five hundred seventy-eight".