6305148721 has 4 divisors (see below), whose sum is σ = 6307796992. Its totient is φ = 6302500452.

The previous prime is 6305148713. The next prime is 6305148743. The reversal of 6305148721 is 1278415036.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6305148721 - 2³ = 6305148713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6305148791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320561 + ... + 1325326.

It is an arithmetic number, because the mean of its divisors is an integer number (1576949248).

Almost surely, 2^6305148721 is an apocalyptic number.

It is an amenable number.

6305148721 is a deficient number, since it is larger than the sum of its proper divisors (2648271).

6305148721 is a wasteful number, since it uses less digits than its factorization.

6305148721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648270.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 6305148721 is about 79404.9666015924. The cubic root of 6305148721 is about 1847.4177483016.

The spelling of 6305148721 in words is "six billion, three hundred five million, one hundred forty-eight thousand, seven hundred twenty-one".