4278728056572 has 72 divisors (see below), whose sum is σ = 11088856567152. Its totient is φ = 1390277510400.

The previous prime is 4278728056487. The next prime is 4278728056583. The reversal of 4278728056572 is 2756508278724.

4278728056572 is a `hidden beast` number, since 4 + 2 + 7 + 8 + 7 + 2 + 8 + 0 + 56 + 572 = 666.

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, 515863 + ... + 2970449.

It is an arithmetic number, because the mean of its divisors is an integer number (154011896766).

Almost surely, 2^{4278728056572} 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 4278728056572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5544428283576).

4278728056572 is an abundant number, since it is smaller than the sum of its proper divisors (6810128510580).

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

4278728056572 is a wasteful number, since it uses less digits than its factorization.

4278728056572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455819 (or 2455814 counting only the distinct ones).

The product of its (nonzero) digits is 105369600, while the sum is 63.

The spelling of 4278728056572 in words is "four trillion, two hundred seventy-eight billion, seven hundred twenty-eight million, fifty-six thousand, five hundred seventy-two".