7865708609388 has 144 divisors (see below), whose sum is σ = 22253203574784. Its totient is φ = 2117915493120.

The previous prime is 7865708609377. The next prime is 7865708609453. The reversal of 7865708609388 is 8839068075687.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5112856 + ... + 6470912.

It is an arithmetic number, because the mean of its divisors is an integer number (154536135936).

Almost surely, 2^{7865708609388} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7865708609388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11126601787392).

7865708609388 is an abundant number, since it is smaller than the sum of its proper divisors (14387494965396).

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

7865708609388 is a wasteful number, since it uses less digits than its factorization.

7865708609388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358300 (or 1358279 counting only the distinct ones).

The product of its (nonzero) digits is 975421440, while the sum is 75.

The spelling of 7865708609388 in words is "seven trillion, eight hundred sixty-five billion, seven hundred eight million, six hundred nine thousand, three hundred eighty-eight".