30720773771 has 16 divisors (see below), whose sum is σ = 31861535328. Its totient is φ = 29597760000.

The previous prime is 30720773767. The next prime is 30720773803. The reversal of 30720773771 is 17737702703.

It is a cyclic number.

It is not a de Polignac number, because 30720773771 - 2² = 30720773767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30720773761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1597091 + ... + 1616211.

It is an arithmetic number, because the mean of its divisors is an integer number (1991345958).

Almost surely, 2^30720773771 is an apocalyptic number.

30720773771 is a deficient number, since it is larger than the sum of its proper divisors (1140761557).

30720773771 is a wasteful number, since it uses less digits than its factorization.

30720773771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19582.

The product of its (nonzero) digits is 302526, while the sum is 44.

The spelling of 30720773771 in words is "thirty billion, seven hundred twenty million, seven hundred seventy-three thousand, seven hundred seventy-one".