1680505051 has 8 divisors (see below), whose sum is σ = 1762387200. Its totient is φ = 1599357672.

The previous prime is 1680505037. The next prime is 1680505081. The reversal of 1680505051 is 1505050861.

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 1680505051 - 2⁷ = 1680504923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680505081) 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, 179005 + ... + 188158.

It is an arithmetic number, because the mean of its divisors is an integer number (220298400).

Almost surely, 2^1680505051 is an apocalyptic number.

1680505051 is a deficient number, since it is larger than the sum of its proper divisors (81882149).

1680505051 is a wasteful number, since it uses less digits than its factorization.

1680505051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367385.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 1680505051 is about 40993.9635922168. The cubic root of 1680505051 is about 1188.9035049555.

The spelling of 1680505051 in words is "one billion, six hundred eighty million, five hundred five thousand, fifty-one".