64213546345 has 16 divisors (see below), whose sum is σ = 82997505360. Its totient is φ = 47411322624.

The previous prime is 64213546343. The next prime is 64213546381. The reversal of 64213546345 is 54364531246.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 22259446416 + 41954099929 = 149196^2 + 204827^2 .

It is a cyclic number.

It is not a de Polignac number, because 64213546345 - 2¹ = 64213546343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64213546343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325587 + ... + 484183.

It is an arithmetic number, because the mean of its divisors is an integer number (5187344085).

Almost surely, 2^64213546345 is an apocalyptic number.

64213546345 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64213546345 is a deficient number, since it is larger than the sum of its proper divisors (18783959015).

64213546345 is a wasteful number, since it uses less digits than its factorization.

64213546345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164844.

The product of its digits is 1036800, while the sum is 43.

The spelling of 64213546345 in words is "sixty-four billion, two hundred thirteen million, five hundred forty-six thousand, three hundred forty-five".