64545451715073 has 16 divisors (see below), whose sum is σ = 98357315890176. Its totient is φ = 36882237072720.

The previous prime is 64545451715071. The next prime is 64545451715081. The reversal of 64545451715073 is 37051715454546.

It is a happy number.

It is not a de Polignac number, because 64545451715073 - 2¹ = 64545451715071 is a prime.

It is a super-2 number, since 2×64545451715073² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64545451715071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35687883 + ... + 37452848.

It is an arithmetic number, because the mean of its divisors is an integer number (6147332243136).

Almost surely, 2^{64545451715073} is an apocalyptic number.

It is an amenable number.

64545451715073 is a deficient number, since it is larger than the sum of its proper divisors (33811864175103).

64545451715073 is a wasteful number, since it uses less digits than its factorization.

64545451715073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73182764.

The product of its (nonzero) digits is 35280000, while the sum is 57.

It can be divided in two parts, 6454545 and 1715073, that added together give a palindrome (8169618).

The spelling of 64545451715073 in words is "sixty-four trillion, five hundred forty-five billion, four hundred fifty-one million, seven hundred fifteen thousand, seventy-three".