648766609884 has 72 divisors (see below), whose sum is σ = 1711460892960. Its totient is φ = 206826356352.

The previous prime is 648766609879. The next prime is 648766609889. The reversal of 648766609884 is 488906667846.

It is an interprime number because it is at equal distance from previous prime (648766609879) and next prime (648766609889).

It is a super-2 number, since 2×648766609884² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648766609889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6932734 + ... + 7025690.

It is an arithmetic number, because the mean of its divisors is an integer number (23770290180).

Almost surely, 2^648766609884 is an apocalyptic number.

It is an amenable number.

648766609884 is an abundant number, since it is smaller than the sum of its proper divisors (1062694283076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648766609884 is a wasteful number, since it uses less digits than its factorization.

648766609884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101419 (or 101414 counting only the distinct ones).

The product of its (nonzero) digits is 668860416, while the sum is 72.

The spelling of 648766609884 in words is "six hundred forty-eight billion, seven hundred sixty-six million, six hundred nine thousand, eight hundred eighty-four".