648642365705 has 32 divisors (see below), whose sum is σ = 811229078016. Its totient is φ = 497465280000.

The previous prime is 648642365687. The next prime is 648642365717. The reversal of 648642365705 is 507563246846.

It is a de Polignac number, because none of the positive numbers 2^k-648642365705 is a prime.

It is a super-3 number, since 3×648642365705³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12867500 + ... + 12917810.

It is an arithmetic number, because the mean of its divisors is an integer number (25350908688).

Almost surely, 2^648642365705 is an apocalyptic number.

It is an amenable number.

648642365705 is a deficient number, since it is larger than the sum of its proper divisors (162586712311).

648642365705 is a wasteful number, since it uses less digits than its factorization.

648642365705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51449.

The product of its (nonzero) digits is 29030400, while the sum is 56.

The spelling of 648642365705 in words is "six hundred forty-eight billion, six hundred forty-two million, three hundred sixty-five thousand, seven hundred five".