648765435258 has 96 divisors (see below), whose sum is σ = 1471989442560. Its totient is φ = 214144741440.

The previous prime is 648765435247. The next prime is 648765435259. The reversal of 648765435258 is 852534567846.

648765435258 is a `hidden beast` number, since 6 + 4 + 8 + 7 + 65 + 43 + 525 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 648765435195 and 648765435204.

It is not an unprimeable number, because it can be changed into a prime (648765435259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33381888 + ... + 33401316.

It is an arithmetic number, because the mean of its divisors is an integer number (15333223360).

Almost surely, 2^648765435258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648765435258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735994721280).

648765435258 is an abundant number, since it is smaller than the sum of its proper divisors (823224007302).

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

648765435258 is a wasteful number, since it uses less digits than its factorization.

648765435258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20114 (or 20102 counting only the distinct ones).

The product of its digits is 193536000, while the sum is 63.

The spelling of 648765435258 in words is "six hundred forty-eight billion, seven hundred sixty-five million, four hundred thirty-five thousand, two hundred fifty-eight".