64340472544 has 48 divisors (see below), whose sum is σ = 127880481456. Its totient is φ = 31864320000.

The previous prime is 64340472529. The next prime is 64340472551. The reversal of 64340472544 is 44527404346.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64340472544.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431664 + ... + 1475920.

It is an arithmetic number, because the mean of its divisors is an integer number (2664176697).

Almost surely, 2^64340472544 is an apocalyptic number.

It is an amenable number.

64340472544 is a deficient number, since it is larger than the sum of its proper divisors (63540008912).

64340472544 is a wasteful number, since it uses less digits than its factorization.

64340472544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44699 (or 44691 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 43.

The spelling of 64340472544 in words is "sixty-four billion, three hundred forty million, four hundred seventy-two thousand, five hundred forty-four".