646454432026 has 24 divisors (see below), whose sum is σ = 1063301618880. Its totient is φ = 294586817616.

The previous prime is 646454431921. The next prime is 646454432027. The reversal of 646454432026 is 620234454646.

646454432026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×646454432026³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (646454432027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12078280 + ... + 12131683.

It is an arithmetic number, because the mean of its divisors is an integer number (44304234120).

Almost surely, 2^646454432026 is an apocalyptic number.

646454432026 is a deficient number, since it is larger than the sum of its proper divisors (416847186854).

646454432026 is a wasteful number, since it uses less digits than its factorization.

646454432026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24210070 (or 24210057 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 46.

The spelling of 646454432026 in words is "six hundred forty-six billion, four hundred fifty-four million, four hundred thirty-two thousand, twenty-six".