30525620436 has 72 divisors (see below), whose sum is σ = 78647272704. Its totient is φ = 9980806080.

The previous prime is 30525620399. The next prime is 30525620443. The reversal of 30525620436 is 63402652503.

30525620436 is a `hidden beast` number, since 3 + 0 + 5 + 25 + 620 + 4 + 3 + 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 30525620436.

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, 473221 + ... + 533843.

It is an arithmetic number, because the mean of its divisors is an integer number (1092323232).

Almost surely, 2^30525620436 is an apocalyptic number.

30525620436 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 30525620436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39323636352).

30525620436 is an abundant number, since it is smaller than the sum of its proper divisors (48121652268).

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

30525620436 is a wasteful number, since it uses less digits than its factorization.

30525620436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60901 (or 60896 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 30525620436 in words is "thirty billion, five hundred twenty-five million, six hundred twenty thousand, four hundred thirty-six".