648646705 has 16 divisors (see below), whose sum is σ = 893798784. Its totient is φ = 442673280.

The previous prime is 648646693. The next prime is 648646711. The reversal of 648646705 is 507646846.

It is not a de Polignac number, because 648646705 - 2⁵ = 648646673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36532 + ... + 51301.

It is an arithmetic number, because the mean of its divisors is an integer number (55862424).

Almost surely, 2^648646705 is an apocalyptic number.

It is an amenable number.

648646705 is a deficient number, since it is larger than the sum of its proper divisors (245152079).

648646705 is a wasteful number, since it uses less digits than its factorization.

648646705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88056.

The product of its (nonzero) digits is 967680, while the sum is 46.

The square root of 648646705 is about 25468.5434408802. The cubic root of 648646705 is about 865.6375199308.

The spelling of 648646705 in words is "six hundred forty-eight million, six hundred forty-six thousand, seven hundred five".