30905340525 has 18 divisors (see below), whose sum is σ = 55354899210. Its totient is φ = 16482848160.

The previous prime is 30905340523. The next prime is 30905340563. The reversal of 30905340525 is 52504350903.

30905340525 is a `hidden beast` number, since 3 + 0 + 90 + 5 + 3 + 40 + 525 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 74545956 + 30830794569 = 8634^2 + 175587^2 .

It is not a de Polignac number, because 30905340525 - 2¹ = 30905340523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30905340525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30905340523) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 68678310 + ... + 68678759.

Almost surely, 2^30905340525 is an apocalyptic number.

It is an amenable number.

30905340525 is a deficient number, since it is larger than the sum of its proper divisors (24449558685).

30905340525 is a wasteful number, since it uses less digits than its factorization.

30905340525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137357085 (or 137357077 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 30905340525 in words is "thirty billion, nine hundred five million, three hundred forty thousand, five hundred twenty-five".