30640495042872 has 256 divisors, whose sum is σ = 100663395840000. Its totient is φ = 8513244633600.

The previous prime is 30640495042847. The next prime is 30640495042909. The reversal of 30640495042872 is 27824059404603.

It is a happy number.

30640495042872 is a `hidden beast` number, since 3 + 0 + 6 + 4 + 0 + 49 + 504 + 28 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1273497 + ... + 7931127.

It is an arithmetic number, because the mean of its divisors is an integer number (393216390000).

Almost surely, 2^{30640495042872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30640495042872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50331697920000).

30640495042872 is an abundant number, since it is smaller than the sum of its proper divisors (70022900797128).

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

30640495042872 is a wasteful number, since it uses less digits than its factorization.

30640495042872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657819 (or 6657809 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 30640495042872 in words is "thirty trillion, six hundred forty billion, four hundred ninety-five million, forty-two thousand, eight hundred seventy-two".