30125828621 has 6 divisors (see below), whose sum is σ = 35044331310. Its totient is φ = 25822138776.

The previous prime is 30125828617. The next prime is 30125828647. The reversal of 30125828621 is 12682852103.

It can be written as a sum of positive squares in only one way, i.e., 26094848521 + 4030980100 = 161539^2 + 63490^2 .

It is not a de Polignac number, because 30125828621 - 2² = 30125828617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30125828671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 307406366 + ... + 307406463.

It is an arithmetic number, because the mean of its divisors is an integer number (5840721885).

Almost surely, 2^30125828621 is an apocalyptic number.

It is an amenable number.

30125828621 is a deficient number, since it is larger than the sum of its proper divisors (4918502689).

30125828621 is an equidigital number, since it uses as much as digits as its factorization.

30125828621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614812843 (or 614812836 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

It can be divided in two parts, 3012582 and 8621, that added together give a palindrome (3021203).

The spelling of 30125828621 in words is "thirty billion, one hundred twenty-five million, eight hundred twenty-eight thousand, six hundred twenty-one".