648149751 has 24 divisors (see below), whose sum is σ = 954869760. Its totient is φ = 423534096.

The previous prime is 648149737. The next prime is 648149753. The reversal of 648149751 is 157941846.

It is not a de Polignac number, because 648149751 - 2⁶ = 648149687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 648149697 and 648149706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648149753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201780 + ... + 204966.

It is an arithmetic number, because the mean of its divisors is an integer number (39786240).

Almost surely, 2^648149751 is an apocalyptic number.

648149751 is a deficient number, since it is larger than the sum of its proper divisors (306720009).

648149751 is a wasteful number, since it uses less digits than its factorization.

648149751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635 (or 3632 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 648149751 is about 25458.7853402318. The cubic root of 648149751 is about 865.4163970240.

The spelling of 648149751 in words is "six hundred forty-eight million, one hundred forty-nine thousand, seven hundred fifty-one".