64437546518 has 4 divisors (see below), whose sum is σ = 96656319780. Its totient is φ = 32218773258.

The previous prime is 64437546493. The next prime is 64437546571. The reversal of 64437546518 is 81564573446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64437546518.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 16109386628 + ... + 16109386631.

It is an arithmetic number, because the mean of its divisors is an integer number (24164079945).

Almost surely, 2^64437546518 is an apocalyptic number.

64437546518 is a deficient number, since it is larger than the sum of its proper divisors (32218773262).

64437546518 is a wasteful number, since it uses less digits than its factorization.

64437546518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32218773261.

The product of its digits is 9676800, while the sum is 53.

The spelling of 64437546518 in words is "sixty-four billion, four hundred thirty-seven million, five hundred forty-six thousand, five hundred eighteen".