30512528640 has 1296 divisors, whose sum is σ = 131206158720. Its totient is φ = 6471843840.

The previous prime is 30512528603. The next prime is 30512528671. The reversal of 30512528640 is 4682521503.

30512528640 is a `hidden beast` number, since 3 + 0 + 5 + 1 + 2 + 5 + 2 + 8 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 30512528595 and 30512528604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1052156146 + ... + 1052156174.

It is an arithmetic number, because the mean of its divisors is an integer number (101239320).

Almost surely, 2^30512528640 is an apocalyptic number.

30512528640 is a gapful number since it is divisible by the number (30) 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 30512528640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65603079360).

30512528640 is an abundant number, since it is smaller than the sum of its proper divisors (100693630080).

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

30512528640 is a wasteful number, since it uses less digits than its factorization.

30512528640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 30512528640 in words is "thirty billion, five hundred twelve million, five hundred twenty-eight thousand, six hundred forty".