648642365758 has 16 divisors (see below), whose sum is σ = 1024189863120. Its totient is φ = 307246334976.

The previous prime is 648642365729. The next prime is 648642365779. The reversal of 648642365758 is 857563246846.

It is a super-2 number, since 2×648642365758² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648642365758.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2893060 + ... + 3109192.

It is an arithmetic number, because the mean of its divisors is an integer number (64011866445).

Almost surely, 2^648642365758 is an apocalyptic number.

648642365758 is a deficient number, since it is larger than the sum of its proper divisors (375547497362).

648642365758 is a wasteful number, since it uses less digits than its factorization.

648642365758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295131.

The product of its digits is 232243200, while the sum is 64.

The spelling of 648642365758 in words is "six hundred forty-eight billion, six hundred forty-two million, three hundred sixty-five thousand, seven hundred fifty-eight".