30720762705 has 32 divisors (see below), whose sum is σ = 53058965760. Its totient is φ = 15131621120.

The previous prime is 30720762689. The next prime is 30720762707. The reversal of 30720762705 is 50726702703.

It is not a de Polignac number, because 30720762705 - 2⁴ = 30720762689 is a prime.

It is a super-2 number, since 2×30720762705² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30720762707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1525266 + ... + 1545275.

It is an arithmetic number, because the mean of its divisors is an integer number (1658092680).

Almost surely, 2^30720762705 is an apocalyptic number.

It is an amenable number.

30720762705 is a deficient number, since it is larger than the sum of its proper divisors (22338203055).

30720762705 is a wasteful number, since it uses less digits than its factorization.

30720762705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070601.

The product of its (nonzero) digits is 123480, while the sum is 39.

The spelling of 30720762705 in words is "thirty billion, seven hundred twenty million, seven hundred sixty-two thousand, seven hundred five".