27778287458628 has 576 divisors, whose sum is σ = 91600960389120. Its totient is φ = 6920295782400.

The previous prime is 27778287458611. The next prime is 27778287458687. The reversal of 27778287458628 is 82685478287772.

27778287458628 is a `hidden beast` number, since 2 + 7 + 7 + 7 + 8 + 2 + 8 + 7 + 4 + 586 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 213569751 + ... + 213699777.

It is an arithmetic number, because the mean of its divisors is an integer number (159029445120).

Almost surely, 2^{27778287458628} is an apocalyptic number.

27778287458628 is a gapful number since it is divisible by the number (28) 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 27778287458628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45800480194560).

27778287458628 is an abundant number, since it is smaller than the sum of its proper divisors (63822672930492).

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

27778287458628 is a wasteful number, since it uses less digits than its factorization.

27778287458628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130168 (or 130163 counting only the distinct ones).

The product of its digits is 9441116160, while the sum is 81.

The spelling of 27778287458628 in words is "twenty-seven trillion, seven hundred seventy-eight billion, two hundred eighty-seven million, four hundred fifty-eight thousand, six hundred twenty-eight".