648715251 has 8 divisors (see below), whose sum is σ = 868833280. Its totient is φ = 430537032.

The previous prime is 648715247. The next prime is 648715261. The reversal of 648715251 is 152517846.

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

It is not a de Polignac number, because 648715251 - 2² = 648715247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648715201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484171 + ... + 485508.

It is an arithmetic number, because the mean of its divisors is an integer number (108604160).

Almost surely, 2^648715251 is an apocalyptic number.

648715251 is a deficient number, since it is larger than the sum of its proper divisors (220118029).

648715251 is a wasteful number, since it uses less digits than its factorization.

648715251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969905.

The product of its digits is 67200, while the sum is 39.

The square root of 648715251 is about 25469.8891045878. The cubic root of 648715251 is about 865.6680110539.

The spelling of 648715251 in words is "six hundred forty-eight million, seven hundred fifteen thousand, two hundred fifty-one".