6523166294401 has 3 divisors (see below), whose sum is σ = 6523168848451. Its totient is φ = 6523163740352.

The previous prime is 6523166294399. The next prime is 6523166294413. The reversal of 6523166294401 is 1044926613256.

The square root of 6523166294401 is 2554049.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4579595720001 + 1943570574400 = 2139999^2 + 1394120^2 .

It is not a de Polignac number, because 6523166294401 - 2¹ = 6523166294399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6523166294461) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1277025 + ... + 3831073.

Almost surely, 2^{6523166294401} is an apocalyptic number.

6523166294401 is the 2554049-th square number.

6523166294401 is the 1277025-th centered octagonal number.

It is an amenable number.

6523166294401 is a deficient number, since it is larger than the sum of its proper divisors (2554050).

6523166294401 is an frugal number, since it uses more digits than its factorization.

6523166294401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108098 (or 2554049 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

Multiplying 6523166294401 by its sum of digits (49), we get a square (319635148425649 = 17878343²).

The spelling of 6523166294401 in words is "six trillion, five hundred twenty-three billion, one hundred sixty-six million, two hundred ninety-four thousand, four hundred one".