7138428816564 has 18 divisors (see below), whose sum is σ = 18044361730850. Its totient is φ = 2379476272176.

The previous prime is 7138428816559. The next prime is 7138428816581. The reversal of 7138428816564 is 4656188248317.

7138428816564 is a `hidden beast` number, since 7 + 1 + 38 + 4 + 28 + 8 + 16 + 564 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7111288890000 + 27139926564 = 2666700^2 + 164742^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99144844639 + ... + 99144844710.

Almost surely, 2^{7138428816564} is an apocalyptic number.

It is an amenable number.

7138428816564 is an abundant number, since it is smaller than the sum of its proper divisors (10905932914286).

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

7138428816564 is a wasteful number, since it uses less digits than its factorization.

7138428816564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198289689359 (or 198289689354 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 7138428816564 in words is "seven trillion, one hundred thirty-eight billion, four hundred twenty-eight million, eight hundred sixteen thousand, five hundred sixty-four".