61564504464323 has 16 divisors (see below), whose sum is σ = 73527522984960. Its totient is φ = 50445729524736.

The previous prime is 61564504464289. The next prime is 61564504464329. The reversal of 61564504464323 is 32346440546516.

It is not a de Polignac number, because 61564504464323 - 2²² = 61564500270019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61564504464329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2175871358 + ... + 2175899651.

It is an arithmetic number, because the mean of its divisors is an integer number (4595470186560).

Almost surely, 2^{61564504464323} is an apocalyptic number.

61564504464323 is a deficient number, since it is larger than the sum of its proper divisors (11963018520637).

61564504464323 is a wasteful number, since it uses less digits than its factorization.

61564504464323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351771106.

The product of its (nonzero) digits is 24883200, while the sum is 53.

The spelling of 61564504464323 in words is "sixty-one trillion, five hundred sixty-four billion, five hundred four million, four hundred sixty-four thousand, three hundred twenty-three".