30720545370 has 96 divisors (see below), whose sum is σ = 82486993680. Its totient is φ = 7926543360.

The previous prime is 30720545369. The next prime is 30720545413. The reversal of 30720545370 is 7354502703.

30720545370 is a `hidden beast` number, since 3 + 0 + 72 + 0 + 54 + 537 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4832057169 + 25888488201 = 69513^2 + 160899^2 .

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 577246 + ... + 628214.

Almost surely, 2^30720545370 is an apocalyptic number.

30720545370 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30720545370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41243496840).

30720545370 is an abundant number, since it is smaller than the sum of its proper divisors (51766448310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30720545370 is a wasteful number, since it uses less digits than its factorization.

30720545370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51200 (or 51197 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 36.

The spelling of 30720545370 in words is "thirty billion, seven hundred twenty million, five hundred forty-five thousand, three hundred seventy".