64354574873689 has 4 divisors (see below), whose sum is σ = 64361122301860. Its totient is φ = 64348027445520.

The previous prime is 64354574873663. The next prime is 64354574873713. The reversal of 64354574873689 is 98637847545346.

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 40731008947225 + 23623565926464 = 6382085^2 + 4860408^2 .

It is a cyclic number.

It is not a de Polignac number, because 64354574873689 - 2²³ = 64354566485081 is a prime.

It is a super-2 number, since 2×64354574873689² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64354574873389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3273699342 + ... + 3273718999.

It is an arithmetic number, because the mean of its divisors is an integer number (16090280575465).

Almost surely, 2^{64354574873689} is an apocalyptic number.

It is an amenable number.

64354574873689 is a deficient number, since it is larger than the sum of its proper divisors (6547428171).

64354574873689 is an equidigital number, since it uses as much as digits as its factorization.

64354574873689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547428170.

The product of its digits is 14631321600, while the sum is 79.

The spelling of 64354574873689 in words is "sixty-four trillion, three hundred fifty-four billion, five hundred seventy-four million, eight hundred seventy-three thousand, six hundred eighty-nine".