648631955 has 8 divisors (see below), whose sum is σ = 778529232. Its totient is φ = 518791648.

The previous prime is 648631939. The next prime is 648631987. The reversal of 648631955 is 559136846.

It is a happy number.

648631955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 648631955 - 2⁴ = 648631939 is a prime.

It is a Duffinian number.

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, 17072 + ... + 39858.

It is an arithmetic number, because the mean of its divisors is an integer number (97316154).

Almost surely, 2^648631955 is an apocalyptic number.

648631955 is a deficient number, since it is larger than the sum of its proper divisors (129897277).

648631955 is a wasteful number, since it uses less digits than its factorization.

648631955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28485.

The product of its digits is 777600, while the sum is 47.

The square root of 648631955 is about 25468.2538663333. The cubic root of 648631955 is about 865.6309584493.

The spelling of 648631955 in words is "six hundred forty-eight million, six hundred thirty-one thousand, nine hundred fifty-five".