30781836480 has 56 divisors (see below), whose sum is σ = 97732333872. Its totient is φ = 8208489472.

The previous prime is 30781836467. The next prime is 30781836487. The reversal of 30781836480 is 8463818703.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (30781836487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16031247 + ... + 16033166.

Almost surely, 2^30781836480 is an apocalyptic number.

30781836480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30781836480 is an abundant number, since it is smaller than the sum of its proper divisors (66950497392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30781836480 is a wasteful number, since it uses less digits than its factorization.

30781836480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32064433 (or 32064423 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 30781836480 in words is "thirty billion, seven hundred eighty-one million, eight hundred thirty-six thousand, four hundred eighty".