74656565648 has 20 divisors (see below), whose sum is σ = 165310967040. Its totient is φ = 31995670944.

The previous prime is 74656565647. The next prime is 74656565671. The reversal of 74656565648 is 84656565647.

It is a super-3 number, since 3×74656565648³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (74656565647) 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, 333288128 + ... + 333288351.

It is an arithmetic number, because the mean of its divisors is an integer number (8265548352).

Almost surely, 2^74656565648 is an apocalyptic number.

It is an amenable number.

74656565648 is an abundant number, since it is smaller than the sum of its proper divisors (90654401392).

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

74656565648 is a wasteful number, since it uses less digits than its factorization.

74656565648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666576494 (or 666576488 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 62.

Subtracting 74656565648 from its reverse (84656565647), we obtain a palindrome (9999999999).

The spelling of 74656565648 in words is "seventy-four billion, six hundred fifty-six million, five hundred sixty-five thousand, six hundred forty-eight".