64134617545 has 16 divisors (see below), whose sum is σ = 77312953872. Its totient is φ = 51073597440.

The previous prime is 64134617473. The next prime is 64134617563. The reversal of 64134617545 is 54571643146.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 19861828624 + 44272788921 = 140932^2 + 210411^2 .

It is not a de Polignac number, because 64134617545 - 2²¹ = 64132520393 is a prime.

It is a super-2 number, since 2×64134617545² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64134617495 and 64134617504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3307699 + ... + 3327031.

It is an arithmetic number, because the mean of its divisors is an integer number (4832059617).

Almost surely, 2^64134617545 is an apocalyptic number.

It is an amenable number.

64134617545 is a deficient number, since it is larger than the sum of its proper divisors (13178336327).

64134617545 is a wasteful number, since it uses less digits than its factorization.

64134617545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22332.

The product of its digits is 1209600, while the sum is 46.

The spelling of 64134617545 in words is "sixty-four billion, one hundred thirty-four million, six hundred seventeen thousand, five hundred forty-five".