30275828812661 has 4 divisors (see below), whose sum is σ = 30356997254892. Its totient is φ = 30194660370432.

The previous prime is 30275828812597. The next prime is 30275828812709. The reversal of 30275828812661 is 16621882857203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12880339588561 + 17395489224100 = 3588919^2 + 4170790^2 .

It is a cyclic number.

It is not a de Polignac number, because 30275828812661 - 2⁶ = 30275828812597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30275828812661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30275828812961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40584220556 + ... + 40584221301.

It is an arithmetic number, because the mean of its divisors is an integer number (7589249313723).

Almost surely, 2^{30275828812661} is an apocalyptic number.

It is an amenable number.

30275828812661 is a deficient number, since it is larger than the sum of its proper divisors (81168442231).

30275828812661 is an equidigital number, since it uses as much as digits as its factorization.

30275828812661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81168442230.

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 30275828812661 in words is "thirty trillion, two hundred seventy-five billion, eight hundred twenty-eight million, eight hundred twelve thousand, six hundred sixty-one".