646006423544 has 48 divisors (see below), whose sum is σ = 1238307852600. Its totient is φ = 315857708480.

The previous prime is 646006423537. The next prime is 646006423679. The reversal of 646006423544 is 445324600646.

It is a junction number, because it is equal to n+sod(n) for n = 646006423495 and 646006423504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17200274 + ... + 17237790.

Almost surely, 2^646006423544 is an apocalyptic number.

It is an amenable number.

646006423544 is a deficient number, since it is larger than the sum of its proper divisors (592301429056).

646006423544 is a wasteful number, since it uses less digits than its factorization.

646006423544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37964 (or 37769 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 44.

The spelling of 646006423544 in words is "six hundred forty-six billion, six million, four hundred twenty-three thousand, five hundred forty-four".