648277243824 has 80 divisors (see below), whose sum is σ = 1918641405440. Its totient is φ = 184769164800.

The previous prime is 648277243781. The next prime is 648277243837. The reversal of 648277243824 is 428342772846.

It is a happy number.

It is a super-2 number, since 2×648277243824² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2221252 + ... + 2496099.

It is an arithmetic number, because the mean of its divisors is an integer number (23983017568).

Almost surely, 2^648277243824 is an apocalyptic number.

It is an amenable number.

648277243824 is an abundant number, since it is smaller than the sum of its proper divisors (1270364161616).

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

648277243824 is a wasteful number, since it uses less digits than its factorization.

648277243824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4717778 (or 4717772 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 57.

The spelling of 648277243824 in words is "six hundred forty-eight billion, two hundred seventy-seven million, two hundred forty-three thousand, eight hundred twenty-four".