647899081215 has 16 divisors (see below), whose sum is σ = 1061922397536. Its totient is φ = 337118220800.

The previous prime is 647899081213. The next prime is 647899081229. The reversal of 647899081215 is 512180998746.

It is not a de Polignac number, because 647899081215 - 2¹ = 647899081213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647899081211) 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, 526746606 + ... + 526747835.

It is an arithmetic number, because the mean of its divisors is an integer number (66370149846).

Almost surely, 2^647899081215 is an apocalyptic number.

647899081215 is a deficient number, since it is larger than the sum of its proper divisors (414023316321).

647899081215 is a wasteful number, since it uses less digits than its factorization.

647899081215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053494490.

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 647899081215 in words is "six hundred forty-seven billion, eight hundred ninety-nine million, eighty-one thousand, two hundred fifteen".