648153391 has 8 divisors (see below), whose sum is σ = 665207424. Its totient is φ = 631319640.

The previous prime is 648153347. The next prime is 648153397. The reversal of 648153391 is 193351846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648153391 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 (648153397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49101 + ... + 60886.

It is an arithmetic number, because the mean of its divisors is an integer number (83150928).

Almost surely, 2^648153391 is an apocalyptic number.

648153391 is a deficient number, since it is larger than the sum of its proper divisors (17054033).

648153391 is a wasteful number, since it uses less digits than its factorization.

648153391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110141.

The product of its digits is 77760, while the sum is 40.

The square root of 648153391 is about 25458.8568282238. The cubic root of 648153391 is about 865.4180170765.

The spelling of 648153391 in words is "six hundred forty-eight million, one hundred fifty-three thousand, three hundred ninety-one".