64486518645 has 8 divisors (see below), whose sum is σ = 103178429856. Its totient is φ = 34392809936.

The previous prime is 64486518637. The next prime is 64486518647. The reversal of 64486518645 is 54681568446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64486518645 - 2³ = 64486518637 is a prime.

It is a super-2 number, since 2×64486518645² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64486518647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2149550607 + ... + 2149550636.

It is an arithmetic number, because the mean of its divisors is an integer number (12897303732).

Almost surely, 2^64486518645 is an apocalyptic number.

It is an amenable number.

64486518645 is a deficient number, since it is larger than the sum of its proper divisors (38691911211).

64486518645 is a wasteful number, since it uses less digits than its factorization.

64486518645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299101251.

The product of its digits is 22118400, while the sum is 57.

The spelling of 64486518645 in words is "sixty-four billion, four hundred eighty-six million, five hundred eighteen thousand, six hundred forty-five".