64144402436 has 24 divisors (see below), whose sum is σ = 112430962560. Its totient is φ = 32021308800.

The previous prime is 64144402423. The next prime is 64144402451. The reversal of 64144402436 is 63420444146.

It is a super-2 number, since 2×64144402436² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64144402436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11470001 + ... + 11475591.

It is an arithmetic number, because the mean of its divisors is an integer number (4684623440).

Almost surely, 2^64144402436 is an apocalyptic number.

It is an amenable number.

64144402436 is a deficient number, since it is larger than the sum of its proper divisors (48286560124).

64144402436 is a wasteful number, since it uses less digits than its factorization.

64144402436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9635 (or 9633 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 64144402436 in words is "sixty-four billion, one hundred forty-four million, four hundred two thousand, four hundred thirty-six".