648773254523 has 4 divisors (see below), whose sum is σ = 686936387160. Its totient is φ = 610610121888.

The previous prime is 648773254513. The next prime is 648773254529. The reversal of 648773254523 is 325452377846.

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

It is not a de Polignac number, because 648773254523 - 2¹⁸ = 648772992379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648773254529) 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, 19081566293 + ... + 19081566326.

It is an arithmetic number, because the mean of its divisors is an integer number (171734096790).

Almost surely, 2^648773254523 is an apocalyptic number.

648773254523 is a deficient number, since it is larger than the sum of its proper divisors (38163132637).

648773254523 is a wasteful number, since it uses less digits than its factorization.

648773254523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38163132636.

The product of its digits is 33868800, while the sum is 56.

The spelling of 648773254523 in words is "six hundred forty-eight billion, seven hundred seventy-three million, two hundred fifty-four thousand, five hundred twenty-three".