30880220861 has 24 divisors (see below), whose sum is σ = 36307011384. Its totient is φ = 26185420800.

The previous prime is 30880220837. The next prime is 30880220863. The reversal of 30880220861 is 16802208803.

It can be written as a sum of positive squares in 4 ways, for example, as 6545780836 + 24334440025 = 80906^2 + 155995^2 .

It is not a de Polignac number, because 30880220861 - 2¹⁰ = 30880219837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30880220863) 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 23 ways as a sum of consecutive naturals, for example, 10455761 + ... + 10458713.

It is an arithmetic number, because the mean of its divisors is an integer number (1512792141).

Almost surely, 2^30880220861 is an apocalyptic number.

It is an amenable number.

30880220861 is a deficient number, since it is larger than the sum of its proper divisors (5426790523).

30880220861 is a wasteful number, since it uses less digits than its factorization.

30880220861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181 (or 5174 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 30880220861 in words is "thirty billion, eight hundred eighty million, two hundred twenty thousand, eight hundred sixty-one".