78555757284 has 135 divisors (see below), whose sum is σ = 214994747737. Its totient is φ = 25009766496.

The previous prime is 78555757229. The next prime is 78555757331. The reversal of 78555757284 is 48275755587.

The square root of 78555757284 is 280278.

It is a perfect power (a square), and thus also a powerful number.

78555757284 is a `hidden beast` number, since 7 + 8 + 5 + 5 + 57 + 572 + 8 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 78092302500 + 463454784 = 279450^2 + 21528^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 116034754 + ... + 116035430.

Almost surely, 2^78555757284 is an apocalyptic number.

78555757284 is the 280278-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78555757284

78555757284 is an abundant number, since it is smaller than the sum of its proper divisors (136438990453).

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

78555757284 is an equidigital number, since it uses as much as digits as its factorization.

78555757284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416 (or 705 counting only the distinct ones).

The product of its digits is 109760000, while the sum is 63.

The spelling of 78555757284 in words is "seventy-eight billion, five hundred fifty-five million, seven hundred fifty-seven thousand, two hundred eighty-four".