648061511 has 2 divisors, whose sum is σ = 648061512. Its totient is φ = 648061510.

The previous prime is 648061483. The next prime is 648061523. The reversal of 648061511 is 115160846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648061511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648061591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324030755 + 324030756.

It is an arithmetic number, because the mean of its divisors is an integer number (324030756).

Almost surely, 2^648061511 is an apocalyptic number.

648061511 is a deficient number, since it is larger than the sum of its proper divisors (1).

648061511 is an equidigital number, since it uses as much as digits as its factorization.

648061511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 648061511 is about 25457.0522841903. The cubic root of 648061511 is about 865.3771222482.

The spelling of 648061511 in words is "six hundred forty-eight million, sixty-one thousand, five hundred eleven".