30561331356 has 72 divisors (see below), whose sum is σ = 81512085200. Its totient is φ = 9627932160.

The previous prime is 30561331349. The next prime is 30561331379. The reversal of 30561331356 is 65313316503.

30561331356 is a `hidden beast` number, since 3 + 0 + 5 + 613 + 3 + 1 + 35 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30561331356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234900 + ... + 341028.

Almost surely, 2^30561331356 is an apocalyptic number.

30561331356 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30561331356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40756042600).

30561331356 is an abundant number, since it is smaller than the sum of its proper divisors (50950753844).

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

30561331356 is a wasteful number, since it uses less digits than its factorization.

30561331356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106579 (or 106574 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 36.

Adding to 30561331356 its reverse (65313316503), we get a palindrome (95874647859).

The spelling of 30561331356 in words is "thirty billion, five hundred sixty-one million, three hundred thirty-one thousand, three hundred fifty-six".