52947378581 has 2 divisors, whose sum is σ = 52947378582. Its totient is φ = 52947378580.

The previous prime is 52947378521. The next prime is 52947378683. The reversal of 52947378581 is 18587374925.

52947378581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36676080100 + 16271298481 = 191510^2 + 127559^2 .

It is a cyclic number.

It is not a de Polignac number, because 52947378581 - 2¹⁴ = 52947362197 is a prime.

It is a super-2 number, since 2×52947378581² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52947378581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52947378521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26473689290 + 26473689291.

It is an arithmetic number, because the mean of its divisors is an integer number (26473689291).

Almost surely, 2^52947378581 is an apocalyptic number.

It is an amenable number.

52947378581 is a deficient number, since it is larger than the sum of its proper divisors (1).

52947378581 is an equidigital number, since it uses as much as digits as its factorization.

52947378581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 59.

The spelling of 52947378581 in words is "fifty-two billion, nine hundred forty-seven million, three hundred seventy-eight thousand, five hundred eighty-one".