30661051536 has 120 divisors (see below), whose sum is σ = 87098500736. Its totient is φ = 10067742720.

The previous prime is 30661051493. The next prime is 30661051541. The reversal of 30661051536 is 63515016603.

30661051536 is a `hidden beast` number, since 3 + 0 + 6 + 610 + 5 + 1 + 5 + 36 = 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 30661051536.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2857221 + ... + 2867931.

Almost surely, 2^30661051536 is an apocalyptic number.

30661051536 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 30661051536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43549250368).

30661051536 is an abundant number, since it is smaller than the sum of its proper divisors (56437449200).

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

30661051536 is a wasteful number, since it uses less digits than its factorization.

30661051536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11021 (or 11012 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The spelling of 30661051536 in words is "thirty billion, six hundred sixty-one million, fifty-one thousand, five hundred thirty-six".