30707546190721 has 27 divisors (see below), whose sum is σ = 32784162313161. Its totient is φ = 28756610552064.

The previous prime is 30707546190719. The next prime is 30707546190749. The reversal of 30707546190721 is 12709164570703.

It is a happy number.

The square root of 30707546190721 is 5541439.

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

It can be written as a sum of positive squares in 4 ways, for example, as 15502989121 + 30692043201600 = 124511^2 + 5540040^2 .

It is not a de Polignac number, because 30707546190721 - 2¹ = 30707546190719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30707546190521) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21949639180 + ... + 21949640578.

Almost surely, 2^{30707546190721} is an apocalyptic number.

30707546190721 is the 5541439-th square number.

30707546190721 is the 2770720-th centered octagonal number.

It is an amenable number.

30707546190721 is a deficient number, since it is larger than the sum of its proper divisors (2076616122440).

30707546190721 is an frugal number, since it uses more digits than its factorization.

30707546190721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 30707546190721 in words is "thirty trillion, seven hundred seven billion, five hundred forty-six million, one hundred ninety thousand, seven hundred twenty-one".