648613701 has 6 divisors (see below), whose sum is σ = 936886470. Its totient is φ = 432409128.

The previous prime is 648613627. The next prime is 648613711. The reversal of 648613701 is 107316846.

648613701 is a `hidden beast` number, since 648 + 6 + 1 + 3 + 7 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 615089601 + 33524100 = 24801^2 + 5790^2 .

It is not a de Polignac number, because 648613701 - 2⁷ = 648613573 is a prime.

It is a super-4 number, since 4×648613701⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648613711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36034086 + ... + 36034103.

It is an arithmetic number, because the mean of its divisors is an integer number (156147745).

Almost surely, 2^648613701 is an apocalyptic number.

It is an amenable number.

648613701 is a deficient number, since it is larger than the sum of its proper divisors (288272769).

648613701 is a wasteful number, since it uses less digits than its factorization.

648613701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72068195 (or 72068192 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 648613701 is about 25467.8954960947. The cubic root of 648613701 is about 865.6228380888.

The spelling of 648613701 in words is "six hundred forty-eight million, six hundred thirteen thousand, seven hundred one".