64440680484 has 48 divisors (see below), whose sum is σ = 151003419840. Its totient is φ = 21388730880.

The previous prime is 64440680483. The next prime is 64440680527. The reversal of 64440680484 is 48408604446.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64440680483) 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, 2751544 + ... + 2774864.

It is an arithmetic number, because the mean of its divisors is an integer number (3145904580).

Almost surely, 2^64440680484 is an apocalyptic number.

It is an amenable number.

64440680484 is an abundant number, since it is smaller than the sum of its proper divisors (86562739356).

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

64440680484 is a wasteful number, since it uses less digits than its factorization.

64440680484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24300 (or 24298 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 48.

The spelling of 64440680484 in words is "sixty-four billion, four hundred forty million, six hundred eighty thousand, four hundred eighty-four".