30720602501 has 16 divisors (see below), whose sum is σ = 31340358000. Its totient is φ = 30108046848.

The previous prime is 30720602489. The next prime is 30720602543. The reversal of 30720602501 is 10520602703.

It can be written as a sum of positive squares in 8 ways, for example, as 1701480001 + 29019122500 = 41249^2 + 170350^2 .

It is a cyclic number.

It is not a de Polignac number, because 30720602501 - 2³⁴ = 13540733317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30720602551) 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 15 ways as a sum of consecutive naturals, for example, 5370695 + ... + 5376411.

It is an arithmetic number, because the mean of its divisors is an integer number (1958772375).

Almost surely, 2^30720602501 is an apocalyptic number.

It is an amenable number.

30720602501 is a deficient number, since it is larger than the sum of its proper divisors (619755499).

30720602501 is a wasteful number, since it uses less digits than its factorization.

30720602501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6328.

The product of its (nonzero) digits is 2520, while the sum is 26.

The spelling of 30720602501 in words is "thirty billion, seven hundred twenty million, six hundred two thousand, five hundred one".