647626506 has 16 divisors (see below), whose sum is σ = 1295732064. Its totient is φ = 215795664.

The previous prime is 647626493. The next prime is 647626523. The reversal of 647626506 is 605626746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000 + ... + 36003.

It is an arithmetic number, because the mean of its divisors is an integer number (80983254).

Almost surely, 2^647626506 is an apocalyptic number.

647626506 is an abundant number, since it is smaller than the sum of its proper divisors (648105558).

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

647626506 is a wasteful number, since it uses less digits than its factorization.

647626506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39925.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 647626506 is about 25448.5069503105. The cubic root of 647626506 is about 865.1834535773.

The spelling of 647626506 in words is "six hundred forty-seven million, six hundred twenty-six thousand, five hundred six".