30281785961 has 4 divisors (see below), whose sum is σ = 34607755392. Its totient is φ = 25955816532.

The previous prime is 30281785957. The next prime is 30281785969. The reversal of 30281785961 is 16958718203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30281785961 - 2² = 30281785957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30281785969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162984705 + ... + 2162984718.

It is an arithmetic number, because the mean of its divisors is an integer number (8651938848).

Almost surely, 2^30281785961 is an apocalyptic number.

It is an amenable number.

30281785961 is a deficient number, since it is larger than the sum of its proper divisors (4325969431).

30281785961 is an equidigital number, since it uses as much as digits as its factorization.

30281785961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325969430.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 30281785961 in words is "thirty billion, two hundred eighty-one million, seven hundred eighty-five thousand, nine hundred sixty-one".