30155461520 has 20 divisors (see below), whose sum is σ = 70111448220. Its totient is φ = 12062184576.

The previous prime is 30155461519. The next prime is 30155461541. The reversal of 30155461520 is 2516455103.

It can be written as a sum of positive squares in 2 ways, for example, as 14464391824 + 15691069696 = 120268^2 + 125264^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 188471555 + ... + 188471714.

It is an arithmetic number, because the mean of its divisors is an integer number (3505572411).

Almost surely, 2^30155461520 is an apocalyptic number.

It is an amenable number.

30155461520 is an abundant number, since it is smaller than the sum of its proper divisors (39955986700).

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

30155461520 is a wasteful number, since it uses less digits than its factorization.

30155461520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376943282 (or 376943276 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 30155461520 in words is "thirty billion, one hundred fifty-five million, four hundred sixty-one thousand, five hundred twenty".