648918725 has 48 divisors (see below), whose sum is σ = 997436160. Its totient is φ = 407808000.

The previous prime is 648918701. The next prime is 648918749. The reversal of 648918725 is 527819846.

It is an interprime number because it is at equal distance from previous prime (648918701) and next prime (648918749).

It is not a de Polignac number, because 648918725 - 2⁶ = 648918661 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 342581 + ... + 344469.

It is an arithmetic number, because the mean of its divisors is an integer number (20779920).

Almost surely, 2^648918725 is an apocalyptic number.

648918725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

648918725 is a deficient number, since it is larger than the sum of its proper divisors (348517435).

648918725 is a wasteful number, since it uses less digits than its factorization.

648918725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070 (or 2065 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 648918725 is about 25473.8831943620. The cubic root of 648918725 is about 865.7585091678.

The spelling of 648918725 in words is "six hundred forty-eight million, nine hundred eighteen thousand, seven hundred twenty-five".