648980641 has 4 divisors (see below), whose sum is σ = 651448512. Its totient is φ = 646512772.

The previous prime is 648980617. The next prime is 648980669. The reversal of 648980641 is 146089846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 648980641 - 2²⁵ = 615426209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648980591 and 648980600.

It is not an unprimeable number, because it can be changed into a prime (648980041) 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, 1233541 + ... + 1234066.

It is an arithmetic number, because the mean of its divisors is an integer number (162862128).

Almost surely, 2^648980641 is an apocalyptic number.

It is an amenable number.

648980641 is a deficient number, since it is larger than the sum of its proper divisors (2467871).

648980641 is a wasteful number, since it uses less digits than its factorization.

648980641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467870.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 648980641 is about 25475.0984492700. The cubic root of 648980641 is about 865.7860434835.

The spelling of 648980641 in words is "six hundred forty-eight million, nine hundred eighty thousand, six hundred forty-one".