648132553 has 4 divisors (see below), whose sum is σ = 648536980. Its totient is φ = 647728128.

The previous prime is 648132539. The next prime is 648132557. The reversal of 648132553 is 355231846.

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

It can be written as a sum of positive squares in 2 ways, for example, as 548871184 + 99261369 = 23428^2 + 9963^2 .

It is a cyclic number.

It is not a de Polignac number, because 648132553 - 2⁹ = 648132041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648132557) 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, 199800 + ... + 203017.

It is an arithmetic number, because the mean of its divisors is an integer number (162134245).

Almost surely, 2^648132553 is an apocalyptic number.

It is an amenable number.

648132553 is a deficient number, since it is larger than the sum of its proper divisors (404427).

648132553 is a wasteful number, since it uses less digits than its factorization.

648132553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404426.

The product of its digits is 86400, while the sum is 37.

The square root of 648132553 is about 25458.4475763940. The cubic root of 648132553 is about 865.4087426392.

The spelling of 648132553 in words is "six hundred forty-eight million, one hundred thirty-two thousand, five hundred fifty-three".