648153791 has 4 divisors (see below), whose sum is σ = 648237000. Its totient is φ = 648070584.

The previous prime is 648153767. The next prime is 648153851. The reversal of 648153791 is 197351846.

648153791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 648153791 - 2²⁶ = 581044927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648150791) 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, 28556 + ... + 45953.

It is an arithmetic number, because the mean of its divisors is an integer number (162059250).

Almost surely, 2^648153791 is an apocalyptic number.

648153791 is a deficient number, since it is larger than the sum of its proper divisors (83209).

648153791 is an equidigital number, since it uses as much as digits as its factorization.

648153791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83208.

The product of its digits is 181440, while the sum is 44.

The square root of 648153791 is about 25458.8646840349. The cubic root of 648153791 is about 865.4181951038.

The spelling of 648153791 in words is "six hundred forty-eight million, one hundred fifty-three thousand, seven hundred ninety-one".