5378612827561 has 4 divisors (see below), whose sum is σ = 5509798506324. Its totient is φ = 5247427148800.

The previous prime is 5378612827529. The next prime is 5378612827571. The reversal of 5378612827561 is 1657282168735.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1798120083600 + 3580492743961 = 1340940^2 + 1892219^2 .

It is a cyclic number.

It is not a de Polignac number, because 5378612827561 - 2⁵ = 5378612827529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5378612827561.

It is not an unprimeable number, because it can be changed into a prime (5378612827571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65592839320 + ... + 65592839401.

It is an arithmetic number, because the mean of its divisors is an integer number (1377449626581).

Almost surely, 2^{5378612827561} is an apocalyptic number.

It is an amenable number.

5378612827561 is a deficient number, since it is larger than the sum of its proper divisors (131185678763).

5378612827561 is a wasteful number, since it uses less digits than its factorization.

5378612827561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131185678762.

The product of its digits is 33868800, while the sum is 61.

The spelling of 5378612827561 in words is "five trillion, three hundred seventy-eight billion, six hundred twelve million, eight hundred twenty-seven thousand, five hundred sixty-one".