647646045 has 16 divisors (see below), whose sum is σ = 1061508672. Its totient is φ = 336986240.

The previous prime is 647646023. The next prime is 647646049. The reversal of 647646045 is 540646746.

It is a happy number.

It is not a de Polignac number, because 647646045 - 2⁶ = 647645981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647645988 and 647646006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647646049) 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, 525927 + ... + 527156.

It is an arithmetic number, because the mean of its divisors is an integer number (66344292).

Almost surely, 2^647646045 is an apocalyptic number.

It is an amenable number.

647646045 is a deficient number, since it is larger than the sum of its proper divisors (413862627).

647646045 is a wasteful number, since it uses less digits than its factorization.

647646045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053132.

The product of its (nonzero) digits is 483840, while the sum is 42.

The square root of 647646045 is about 25448.8908402704. The cubic root of 647646045 is about 865.1921543996.

The spelling of 647646045 in words is "six hundred forty-seven million, six hundred forty-six thousand, forty-five".