1680151281 has 8 divisors (see below), whose sum is σ = 2245377120. Its totient is φ = 1117513152.

The previous prime is 1680151217. The next prime is 1680151309. The reversal of 1680151281 is 1821510861.

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

It is not a de Polignac number, because 1680151281 - 2⁶ = 1680151217 is a prime.

It is a super-2 number, since 2×1680151281² = 5645816654091881922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1680151181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645411 + ... + 648008.

It is an arithmetic number, because the mean of its divisors is an integer number (280672140).

Almost surely, 2^1680151281 is an apocalyptic number.

It is an amenable number.

1680151281 is a deficient number, since it is larger than the sum of its proper divisors (565225839).

1680151281 is a wasteful number, since it uses less digits than its factorization.

1680151281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293855.

The product of its (nonzero) digits is 3840, while the sum is 33.

The square root of 1680151281 is about 40989.6484615323. The cubic root of 1680151281 is about 1188.8200721188.

The spelling of 1680151281 in words is "one billion, six hundred eighty million, one hundred fifty-one thousand, two hundred eighty-one".