648671523 has 4 divisors (see below), whose sum is σ = 864895368. Its totient is φ = 432447680.

The previous prime is 648671519. The next prime is 648671563. The reversal of 648671523 is 325176846.

648671523 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 648671523 - 2² = 648671519 is a prime.

It is a super-2 number, since 2×648671523² = 841549489502279058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648671563) 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, 108111918 + ... + 108111923.

It is an arithmetic number, because the mean of its divisors is an integer number (216223842).

Almost surely, 2^648671523 is an apocalyptic number.

648671523 is a deficient number, since it is larger than the sum of its proper divisors (216223845).

648671523 is a wasteful number, since it uses less digits than its factorization.

648671523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216223844.

The product of its digits is 241920, while the sum is 42.

The square root of 648671523 is about 25469.0306647112. The cubic root of 648671523 is about 865.6485598995.

The spelling of 648671523 in words is "six hundred forty-eight million, six hundred seventy-one thousand, five hundred twenty-three".