646615561435012 has 48 divisors (see below), whose sum is σ = 1238821962510832. Its totient is φ = 293492693537280.

The previous prime is 646615561434977. The next prime is 646615561435013. The reversal of 646615561435012 is 210534165516646.

646615561435012 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 8 ways, for example, as 76316272516 + 646539245162496 = 276254^2 + 25427136^2 .

It is a super-2 number, since 2×646615561435012² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646615561435013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715023 + ... + 35968630.

Almost surely, 2^{646615561435012} is an apocalyptic number.

It is an amenable number.

646615561435012 is a deficient number, since it is larger than the sum of its proper divisors (592206401075820).

646615561435012 is a wasteful number, since it uses less digits than its factorization.

646615561435012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36689288 (or 36689286 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 646615561435012 in words is "six hundred forty-six trillion, six hundred fifteen billion, five hundred sixty-one million, four hundred thirty-five thousand, twelve".