64734450645 has 8 divisors (see below), whose sum is σ = 103575121056. Its totient is φ = 34525040336.

The previous prime is 64734450617. The next prime is 64734450667. The reversal of 64734450645 is 54605443746.

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 64734450645 - 2⁶ = 64734450581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64734450594 and 64734450603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2157815007 + ... + 2157815036.

It is an arithmetic number, because the mean of its divisors is an integer number (12946890132).

Almost surely, 2^64734450645 is an apocalyptic number.

It is an amenable number.

64734450645 is a deficient number, since it is larger than the sum of its proper divisors (38840670411).

64734450645 is a wasteful number, since it uses less digits than its factorization.

64734450645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315630051.

The product of its (nonzero) digits is 4838400, while the sum is 48.

The spelling of 64734450645 in words is "sixty-four billion, seven hundred thirty-four million, four hundred fifty thousand, six hundred forty-five".