648346591 has 8 divisors (see below), whose sum is σ = 673001280. Its totient is φ = 623845152.

The previous prime is 648346579. The next prime is 648346603. The reversal of 648346591 is 195643846.

It is an interprime number because it is at equal distance from previous prime (648346579) and next prime (648346603).

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

It is a cyclic number.

It is not a de Polignac number, because 648346591 - 2⁷ = 648346463 is a prime.

It is a super-2 number, since 2×648346591² = 840706604122642562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648346541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29655 + ... + 46648.

It is an arithmetic number, because the mean of its divisors is an integer number (84125160).

Almost surely, 2^648346591 is an apocalyptic number.

648346591 is a deficient number, since it is larger than the sum of its proper divisors (24654689).

648346591 is a wasteful number, since it uses less digits than its factorization.

648346591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76625.

The product of its digits is 622080, while the sum is 46.

The square root of 648346591 is about 25462.6509028420. The cubic root of 648346591 is about 865.5039957729.

The spelling of 648346591 in words is "six hundred forty-eight million, three hundred forty-six thousand, five hundred ninety-one".