64544055433 has 16 divisors (see below), whose sum is σ = 75850459776. Its totient is φ = 54146787840.

The previous prime is 64544055427. The next prime is 64544055467. The reversal of 64544055433 is 33455044546.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64544055433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64544055433.

It is not an unprimeable number, because it can be changed into a prime (64544025433) 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, 430041 + ... + 560377.

It is an arithmetic number, because the mean of its divisors is an integer number (4740653736).

Almost surely, 2^64544055433 is an apocalyptic number.

It is an amenable number.

64544055433 is a deficient number, since it is larger than the sum of its proper divisors (11306404343).

64544055433 is a wasteful number, since it uses less digits than its factorization.

64544055433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133824.

The product of its (nonzero) digits is 1728000, while the sum is 43.

Adding to 64544055433 its reverse (33455044546), we get a palindrome (97999099979).

The spelling of 64544055433 in words is "sixty-four billion, five hundred forty-four million, fifty-five thousand, four hundred thirty-three".