648631227845 has 16 divisors (see below), whose sum is σ = 806452692480. Its totient is φ = 500299291200.

The previous prime is 648631227821. The next prime is 648631227851. The reversal of 648631227845 is 548722136846.

648631227845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648631227845 - 2²⁴ = 648614450629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7736591 + ... + 7819980.

It is an arithmetic number, because the mean of its divisors is an integer number (50403293280).

Almost surely, 2^648631227845 is an apocalyptic number.

It is an amenable number.

648631227845 is a deficient number, since it is larger than the sum of its proper divisors (157821464635).

648631227845 is a wasteful number, since it uses less digits than its factorization.

648631227845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15556876.

The product of its digits is 15482880, while the sum is 56.

Subtracting from 648631227845 its reverse (548722136846), we obtain a palindrome (99909090999).

The spelling of 648631227845 in words is "six hundred forty-eight billion, six hundred thirty-one million, two hundred twenty-seven thousand, eight hundred forty-five".