648996538 has 8 divisors (see below), whose sum is σ = 973605888. Its totient is φ = 324461244.

The previous prime is 648996533. The next prime is 648996553. The reversal of 648996538 is 835699846.

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

It is not an unprimeable number, because it can be changed into a prime (648996533) 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, 17095 + ... + 39877.

It is an arithmetic number, because the mean of its divisors is an integer number (121700736).

Almost surely, 2^648996538 is an apocalyptic number.

648996538 is a deficient number, since it is larger than the sum of its proper divisors (324609350).

648996538 is a wasteful number, since it uses less digits than its factorization.

648996538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37028.

The product of its digits is 11197440, while the sum is 58.

The square root of 648996538 is about 25475.4104579298. The cubic root of 648996538 is about 865.7931126663.

The spelling of 648996538 in words is "six hundred forty-eight million, nine hundred ninety-six thousand, five hundred thirty-eight".