64863846540 has 72 divisors (see below), whose sum is σ = 207109134960. Its totient is φ = 16386655104.

The previous prime is 64863846503. The next prime is 64863846601. The reversal of 64863846540 is 4564836846.

64863846540 is a `hidden beast` number, since 64 + 8 + 6 + 38 + 4 + 6 + 540 = 666.

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 23 ways as a sum of consecutive naturals, for example, 9479599 + ... + 9486438.

Almost surely, 2^64863846540 is an apocalyptic number.

64863846540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64863846540 is an abundant number, since it is smaller than the sum of its proper divisors (142245288420).

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

64863846540 is a wasteful number, since it uses less digits than its factorization.

64863846540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18966071 (or 18966066 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 54.

The spelling of 64863846540 in words is "sixty-four billion, eight hundred sixty-three million, eight hundred forty-six thousand, five hundred forty".