30258921657721 has 3 divisors (see below), whose sum is σ = 30258927158533. Its totient is φ = 30258916156910.

The previous prime is 30258921657719. The next prime is 30258921657773. The reversal of 30258921657721 is 12775612985203.

The square root of 30258921657721 is 5500811.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 30258921657721 - 2¹ = 30258921657719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30258321657721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2750406 + ... + 8251216.

Almost surely, 2^{30258921657721} is an apocalyptic number.

30258921657721 is the 5500811-st square number.

30258921657721 is the 2750406-th centered octagonal number.

It is an amenable number.

30258921657721 is a deficient number, since it is larger than the sum of its proper divisors (5500812).

30258921657721 is an frugal number, since it uses more digits than its factorization.

30258921657721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001622 (or 5500811 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 30258921657721 in words is "thirty trillion, two hundred fifty-eight billion, nine hundred twenty-one million, six hundred fifty-seven thousand, seven hundred twenty-one".