647276361127523 has 4 divisors (see below), whose sum is σ = 651399140497920. Its totient is φ = 643153581757128.

The previous prime is 647276361127441. The next prime is 647276361127537. The reversal of 647276361127523 is 325721163672746.

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

It is a cyclic number.

It is not a de Polignac number, because 647276361127523 - 2²⁰ = 647276360078947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647276361147523) 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, 2061389684963 + ... + 2061389685276.

It is an arithmetic number, because the mean of its divisors is an integer number (162849785124480).

Almost surely, 2^{647276361127523} is an apocalyptic number.

647276361127523 is a deficient number, since it is larger than the sum of its proper divisors (4122779370397).

647276361127523 is a wasteful number, since it uses less digits than its factorization.

647276361127523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122779370396.

The product of its digits is 106686720, while the sum is 62.

The spelling of 647276361127523 in words is "six hundred forty-seven trillion, two hundred seventy-six billion, three hundred sixty-one million, one hundred twenty-seven thousand, five hundred twenty-three".