30720545061 has 8 divisors (see below), whose sum is σ = 41479217280. Its totient is φ = 20221118112.

The previous prime is 30720545059. The next prime is 30720545069. The reversal of 30720545061 is 16054502703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30720545061 - 2¹ = 30720545059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30720545069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64811040 + ... + 64811513.

It is an arithmetic number, because the mean of its divisors is an integer number (5184902160).

Almost surely, 2^30720545061 is an apocalyptic number.

It is an amenable number.

30720545061 is a deficient number, since it is larger than the sum of its proper divisors (10758672219).

30720545061 is a wasteful number, since it uses less digits than its factorization.

30720545061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129622635.

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 30720545061 in words is "thirty billion, seven hundred twenty million, five hundred forty-five thousand, sixty-one".