30550502781 has 40 divisors (see below), whose sum is σ = 48101333280. Its totient is φ = 19270071072.

The previous prime is 30550502779. The next prime is 30550502791. The reversal of 30550502781 is 18720505503.

30550502781 is a `hidden beast` number, since 3 + 0 + 550 + 5 + 0 + 27 + 81 = 666.

It is not a de Polignac number, because 30550502781 - 2¹ = 30550502779 is a prime.

It is a super-2 number, since 2×30550502781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30550502791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1214130 + ... + 1239036.

It is an arithmetic number, because the mean of its divisors is an integer number (1202533332).

Almost surely, 2^30550502781 is an apocalyptic number.

It is an amenable number.

30550502781 is a deficient number, since it is larger than the sum of its proper divisors (17550830499).

30550502781 is a wasteful number, since it uses less digits than its factorization.

30550502781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25735 (or 25726 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 30550502781 in words is "thirty billion, five hundred fifty million, five hundred two thousand, seven hundred eighty-one".