64227729161 has 16 divisors (see below), whose sum is σ = 67636615680. Its totient is φ = 60909075840.

The previous prime is 64227729131. The next prime is 64227729169. The reversal of 64227729161 is 16192772246.

It is a cyclic number.

It is not a de Polignac number, because 64227729161 - 2²⁶ = 64160620297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64227729169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524405 + ... + 635181.

It is an arithmetic number, because the mean of its divisors is an integer number (4227288480).

Almost surely, 2^64227729161 is an apocalyptic number.

It is an amenable number.

64227729161 is a deficient number, since it is larger than the sum of its proper divisors (3408886519).

64227729161 is a wasteful number, since it uses less digits than its factorization.

64227729161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111184.

The product of its digits is 508032, while the sum is 47.

The spelling of 64227729161 in words is "sixty-four billion, two hundred twenty-seven million, seven hundred twenty-nine thousand, one hundred sixty-one".