30774897721 has 4 divisors (see below), whose sum is σ = 32394629200. Its totient is φ = 29155166244.

The previous prime is 30774897719. The next prime is 30774897761. The reversal of 30774897721 is 12779847703.

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 30774897721 - 2¹ = 30774897719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30774897761) 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, 809865711 + ... + 809865748.

It is an arithmetic number, because the mean of its divisors is an integer number (8098657300).

Almost surely, 2^30774897721 is an apocalyptic number.

It is an amenable number.

30774897721 is a deficient number, since it is larger than the sum of its proper divisors (1619731479).

30774897721 is a wasteful number, since it uses less digits than its factorization.

30774897721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619731478.

The product of its (nonzero) digits is 4148928, while the sum is 55.

The spelling of 30774897721 in words is "thirty billion, seven hundred seventy-four million, eight hundred ninety-seven thousand, seven hundred twenty-one".