646556010005 has 8 divisors (see below), whose sum is σ = 775884218424. Its totient is φ = 517233470400.

The previous prime is 646556009993. The next prime is 646556010013. The reversal of 646556010005 is 500010655646.

646556010005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6968743441 + 639587266564 = 83479^2 + 799742^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646556010005 - 2³⁸ = 371678103061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1162106 + ... + 1625915.

It is an arithmetic number, because the mean of its divisors is an integer number (96985527303).

Almost surely, 2^646556010005 is an apocalyptic number.

It is an amenable number.

646556010005 is a deficient number, since it is larger than the sum of its proper divisors (129328208419).

646556010005 is a wasteful number, since it uses less digits than its factorization.

646556010005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834407.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 646556010005 in words is "six hundred forty-six billion, five hundred fifty-six million, ten thousand, five".