6146521921 has 8 divisors (see below), whose sum is σ = 6508841184. Its totient is φ = 5784287040.

The previous prime is 6146521879. The next prime is 6146521973. The reversal of 6146521921 is 1291256416.

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 6146521921 - 2¹⁷ = 6146390849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6146521421) 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, 188406 + ... + 218608.

It is an arithmetic number, because the mean of its divisors is an integer number (813605148).

Almost surely, 2^6146521921 is an apocalyptic number.

It is an amenable number.

6146521921 is a deficient number, since it is larger than the sum of its proper divisors (362319263).

6146521921 is a wasteful number, since it uses less digits than its factorization.

6146521921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42191.

The product of its digits is 25920, while the sum is 37.

The square root of 6146521921 is about 78399.7571488586. The cubic root of 6146521921 is about 1831.7933509313.

The spelling of 6146521921 in words is "six billion, one hundred forty-six million, five hundred twenty-one thousand, nine hundred twenty-one".