63566274820 has 24 divisors (see below), whose sum is σ = 133915673304. Its totient is φ = 25345272576.

The previous prime is 63566274787. The next prime is 63566274833. The reversal of 63566274820 is 2847266536.

It can be written as a sum of positive squares in 4 ways, for example, as 9535131904 + 54031142916 = 97648^2 + 232446^2 .

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, 5070919 + ... + 5083438.

It is an arithmetic number, because the mean of its divisors is an integer number (5579819721).

Almost surely, 2^63566274820 is an apocalyptic number.

It is an amenable number.

63566274820 is an abundant number, since it is smaller than the sum of its proper divisors (70349398484).

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

63566274820 is a wasteful number, since it uses less digits than its factorization.

63566274820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154679 (or 10154677 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 63566274820 in words is "sixty-three billion, five hundred sixty-six million, two hundred seventy-four thousand, eight hundred twenty".