64201343845 has 4 divisors (see below), whose sum is σ = 77041612620. Its totient is φ = 51361075072.

The previous prime is 64201343839. The next prime is 64201343851. The reversal of 64201343845 is 54834310246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54834310246 = 2 ⋅27417155123.

It is an interprime number because it is at equal distance from previous prime (64201343839) and next prime (64201343851).

It can be written as a sum of positive squares in 2 ways, for example, as 30357486756 + 33843857089 = 174234^2 + 183967^2 .

It is a cyclic number.

It is not a de Polignac number, because 64201343845 - 2⁹ = 64201343333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64201343798 and 64201343807.

It is a congruent number.

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, 6420134380 + ... + 6420134389.

It is an arithmetic number, because the mean of its divisors is an integer number (19260403155).

Almost surely, 2^64201343845 is an apocalyptic number.

It is an amenable number.

64201343845 is a deficient number, since it is larger than the sum of its proper divisors (12840268775).

64201343845 is a wasteful number, since it uses less digits than its factorization.

64201343845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12840268774.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 64201343845 in words is "sixty-four billion, two hundred one million, three hundred forty-three thousand, eight hundred forty-five".