818526778416 has 40 divisors (see below), whose sum is σ = 2349475013360. Its totient is φ = 272842259328.

The previous prime is 818526778379. The next prime is 818526778427. The reversal of 818526778416 is 614877625818.

It is a happy number.

818526778416 is a `hidden beast` number, since 8 + 18 + 526 + 7 + 7 + 84 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947368525 + ... + 947369388.

It is an arithmetic number, because the mean of its divisors is an integer number (58736875334).

Almost surely, 2^818526778416 is an apocalyptic number.

It is an amenable number.

818526778416 is an abundant number, since it is smaller than the sum of its proper divisors (1530948234944).

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

818526778416 is a wasteful number, since it uses less digits than its factorization.

818526778416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894737930 (or 1894737918 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 63.

The spelling of 818526778416 in words is "eight hundred eighteen billion, five hundred twenty-six million, seven hundred seventy-eight thousand, four hundred sixteen".