648815995 has 8 divisors (see below), whose sum is σ = 780523200. Its totient is φ = 517756800.

The previous prime is 648815953. The next prime is 648816017. The reversal of 648815995 is 599518846.

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

It is not a de Polignac number, because 648815995 - 2⁹ = 648815483 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159795 + ... + 163804.

It is an arithmetic number, because the mean of its divisors is an integer number (97565400).

Almost surely, 2^648815995 is an apocalyptic number.

648815995 is a deficient number, since it is larger than the sum of its proper divisors (131707205).

648815995 is a wasteful number, since it uses less digits than its factorization.

648815995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324005.

The product of its digits is 3110400, while the sum is 55.

The square root of 648815995 is about 25471.8667356753. The cubic root of 648815995 is about 865.7128208240.

It can be divided in two parts, 64881 and 5995, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 648815995 in words is "six hundred forty-eight million, eight hundred fifteen thousand, nine hundred ninety-five".