6151680021 has 8 divisors (see below), whose sum is σ = 8466828544. Its totient is φ = 3968825760.

The previous prime is 6151680019. The next prime is 6151680037. The reversal of 6151680021 is 1200861516.

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

It is not a de Polignac number, because 6151680021 - 2¹ = 6151680019 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 (6151680001) 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, 33073456 + ... + 33073641.

It is an arithmetic number, because the mean of its divisors is an integer number (1058353568).

Almost surely, 2^6151680021 is an apocalyptic number.

It is an amenable number.

6151680021 is a deficient number, since it is larger than the sum of its proper divisors (2315148523).

6151680021 is a wasteful number, since it uses less digits than its factorization.

6151680021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66147131.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 6151680021 is about 78432.6463980401. The cubic root of 6151680021 is about 1832.3056152431.

The spelling of 6151680021 in words is "six billion, one hundred fifty-one million, six hundred eighty thousand, twenty-one".