647449379045 has 8 divisors (see below), whose sum is σ = 887930577024. Its totient is φ = 443965288464.

The previous prime is 647449378903. The next prime is 647449379167. The reversal of 647449379045 is 540973944746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647449379045 is a prime.

It is a super-2 number, since 2×647449379045² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9249276809 + ... + 9249276878.

It is an arithmetic number, because the mean of its divisors is an integer number (110991322128).

Almost surely, 2^647449379045 is an apocalyptic number.

It is an amenable number.

647449379045 is a deficient number, since it is larger than the sum of its proper divisors (240481197979).

647449379045 is a wasteful number, since it uses less digits than its factorization.

647449379045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18498553699.

The product of its (nonzero) digits is 91445760, while the sum is 62.

The spelling of 647449379045 in words is "six hundred forty-seven billion, four hundred forty-nine million, three hundred seventy-nine thousand, forty-five".