78572822528 has 126 divisors (see below), whose sum is σ = 166865327559. Its totient is φ = 36990369792.

The previous prime is 78572822521. The next prime is 78572822551. The reversal of 78572822528 is 82522827587.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 39286411264 + 39286411264 = 198208^2 + 198208^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198208.

It is not an unprimeable number, because it can be changed into a prime (78572822521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 482041775 + ... + 482041937.

Almost surely, 2^78572822528 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 78572822528

78572822528 is an abundant number, since it is smaller than the sum of its proper divisors (88292505031).

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

78572822528 is an frugal number, since it uses more digits than its factorization.

78572822528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 184 counting only the distinct ones).

The product of its digits is 10035200, while the sum is 56.

The spelling of 78572822528 in words is "seventy-eight billion, five hundred seventy-two million, eight hundred twenty-two thousand, five hundred twenty-eight".