648983771251 has 8 divisors (see below), whose sum is σ = 649418316624. Its totient is φ = 648549329280.

The previous prime is 648983771173. The next prime is 648983771273. The reversal of 648983771251 is 152177389846.

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 648983771251 - 2¹⁹ = 648983246963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648983771251.

It is not an unprimeable number, because it can be changed into a prime (648983771351) 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, 15564391 + ... + 15606031.

It is an arithmetic number, because the mean of its divisors is an integer number (81177289578).

Almost surely, 2^648983771251 is an apocalyptic number.

648983771251 is a deficient number, since it is larger than the sum of its proper divisors (434545373).

648983771251 is a wasteful number, since it uses less digits than its factorization.

648983771251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51701.

The product of its digits is 20321280, while the sum is 61.

The spelling of 648983771251 in words is "six hundred forty-eight billion, nine hundred eighty-three million, seven hundred seventy-one thousand, two hundred fifty-one".