643102626456 has 24 divisors (see below), whose sum is σ = 1741736280180. Its totient is φ = 214367542128.

The previous prime is 643102626451. The next prime is 643102626493. The reversal of 643102626456 is 654626201346.

It is a happy number.

643102626456 is a `hidden beast` number, since 6 + 4 + 3 + 10 + 2 + 626 + 4 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×643102626456² (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 (643102626451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4465990390 + ... + 4465990533.

Almost surely, 2^643102626456 is an apocalyptic number.

It is an amenable number.

643102626456 is an abundant number, since it is smaller than the sum of its proper divisors (1098633653724).

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

643102626456 is a wasteful number, since it uses less digits than its factorization.

643102626456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8931980935 (or 8931980928 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 643102626456 in words is "six hundred forty-three billion, one hundred two million, six hundred twenty-six thousand, four hundred fifty-six".