647471542044 has 12 divisors (see below), whose sum is σ = 1510766931464. Its totient is φ = 215823847344.

The previous prime is 647471542037. The next prime is 647471542063. The reversal of 647471542044 is 440245174746.

647471542044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 647471541984 and 647471542002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26977980907 + ... + 26977980930.

Almost surely, 2^647471542044 is an apocalyptic number.

It is an amenable number.

647471542044 is an abundant number, since it is smaller than the sum of its proper divisors (863295389420).

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

647471542044 is a wasteful number, since it uses less digits than its factorization.

647471542044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53955961844 (or 53955961842 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 48.

The spelling of 647471542044 in words is "six hundred forty-seven billion, four hundred seventy-one million, five hundred forty-two thousand, forty-four".