648542311 has 4 divisors (see below), whose sum is σ = 654963624. Its totient is φ = 642121000.

The previous prime is 648542309. The next prime is 648542357. The reversal of 648542311 is 113245846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 648542311 - 2¹ = 648542309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648548311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3210505 + ... + 3210706.

It is an arithmetic number, because the mean of its divisors is an integer number (163740906).

Almost surely, 2^648542311 is an apocalyptic number.

648542311 is a deficient number, since it is larger than the sum of its proper divisors (6421313).

648542311 is a wasteful number, since it uses less digits than its factorization.

648542311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421312.

The product of its digits is 23040, while the sum is 34.

The square root of 648542311 is about 25466.4938890300. The cubic root of 648542311 is about 865.5910785162.

The spelling of 648542311 in words is "six hundred forty-eight million, five hundred forty-two thousand, three hundred eleven".