64507455470545 has 4 divisors (see below), whose sum is σ = 77408946564660. Its totient is φ = 51605964376432.

The previous prime is 64507455470531. The next prime is 64507455470581. The reversal of 64507455470545 is 54507455470546.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50503664067649 + 14003791402896 = 7106593^2 + 3742164^2 .

It is a cyclic number.

It is not a de Polignac number, because 64507455470545 - 2²⁹ = 64506918599633 is a prime.

It is a super-2 number, since 2×64507455470545² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450745547050 + ... + 6450745547059.

It is an arithmetic number, because the mean of its divisors is an integer number (19352236641165).

Almost surely, 2^{64507455470545} is an apocalyptic number.

It is an amenable number.

64507455470545 is a deficient number, since it is larger than the sum of its proper divisors (12901491094115).

64507455470545 is a wasteful number, since it uses less digits than its factorization.

64507455470545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901491094114.

The product of its (nonzero) digits is 235200000, while the sum is 61.

Subtracting from 64507455470545 its reverse (54507455470546), we obtain a palindrome (9999999999999).

The spelling of 64507455470545 in words is "sixty-four trillion, five hundred seven billion, four hundred fifty-five million, four hundred seventy thousand, five hundred forty-five".