648378299492 has 48 divisors (see below), whose sum is σ = 1414908257280. Its totient is φ = 252567655200.

The previous prime is 648378299431. The next prime is 648378299497. The reversal of 648378299492 is 294992873846.

It is not an unprimeable number, because it can be changed into a prime (648378299497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474817 + ... + 1863287.

It is an arithmetic number, because the mean of its divisors is an integer number (29477255360).

Almost surely, 2^648378299492 is an apocalyptic number.

It is an amenable number.

648378299492 is an abundant number, since it is smaller than the sum of its proper divisors (766529957788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648378299492 is a wasteful number, since it uses less digits than its factorization.

648378299492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393912 (or 393910 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 71.

The spelling of 648378299492 in words is "six hundred forty-eight billion, three hundred seventy-eight million, two hundred ninety-nine thousand, four hundred ninety-two".