8125786388 has 6 divisors (see below), whose sum is σ = 14220126186. Its totient is φ = 4062893192.

The previous prime is 8125786369. The next prime is 8125786441. The reversal of 8125786388 is 8836875218.

It can be written as a sum of positive squares in only one way, i.e., 6257126404 + 1868659984 = 79102^2 + 43228^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015723295 + ... + 1015723302.

It is an arithmetic number, because the mean of its divisors is an integer number (2370021031).

Almost surely, 2^8125786388 is an apocalyptic number.

It is an amenable number.

8125786388 is a deficient number, since it is larger than the sum of its proper divisors (6094339798).

8125786388 is a wasteful number, since it uses less digits than its factorization.

8125786388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031446601 (or 2031446599 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 56.

The square root of 8125786388 is about 90143.1438768362. The cubic root of 8125786388 is about 2010.4277356737.

The spelling of 8125786388 in words is "eight billion, one hundred twenty-five million, seven hundred eighty-six thousand, three hundred eighty-eight".