648422637 has 4 divisors (see below), whose sum is σ = 864563520. Its totient is φ = 432281756.

The previous prime is 648422627. The next prime is 648422641. The reversal of 648422637 is 736224846.

648422637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 648422637 - 2¹² = 648418541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648422627) 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, 108070437 + ... + 108070442.

It is an arithmetic number, because the mean of its divisors is an integer number (216140880).

Almost surely, 2^648422637 is an apocalyptic number.

It is an amenable number.

648422637 is a deficient number, since it is larger than the sum of its proper divisors (216140883).

648422637 is a wasteful number, since it uses less digits than its factorization.

648422637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216140882.

The product of its digits is 387072, while the sum is 42.

The square root of 648422637 is about 25464.1441442669. The cubic root of 648422637 is about 865.5378334068.

The spelling of 648422637 in words is "six hundred forty-eight million, four hundred twenty-two thousand, six hundred thirty-seven".