648063332690 has 16 divisors (see below), whose sum is σ = 1166650221528. Its totient is φ = 259195061376.

The previous prime is 648063332669. The next prime is 648063332701. The reversal of 648063332690 is 96233360846.

648063332690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 498420468121 + 149642864569 = 705989^2 + 386837^2 .

It is a super-2 number, since 2×648063332690² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3693947 + ... + 3865406.

Almost surely, 2^648063332690 is an apocalyptic number.

648063332690 is a deficient number, since it is larger than the sum of its proper divisors (518586888838).

648063332690 is a wasteful number, since it uses less digits than its factorization.

648063332690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7567933.

The product of its (nonzero) digits is 3359232, while the sum is 50.

The spelling of 648063332690 in words is "six hundred forty-eight billion, sixty-three million, three hundred thirty-two thousand, six hundred ninety".