64206161 has 8 divisors (see below), whose sum is σ = 69266664. Its totient is φ = 59288320.

The previous prime is 64206157. The next prime is 64206169. The reversal of 64206161 is 16160246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22848400 + 41357761 = 4780^2 + 6431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64206161 - 2² = 64206157 is a prime.

It is a super-2 number, since 2×64206161² = 8244862220715842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64206161.

It is not an unprimeable number, because it can be changed into a prime (64206169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34730 + ... + 36531.

It is an arithmetic number, because the mean of its divisors is an integer number (8658333).

Almost surely, 2^64206161 is an apocalyptic number.

It is an amenable number.

64206161 is a deficient number, since it is larger than the sum of its proper divisors (5060503).

64206161 is a wasteful number, since it uses less digits than its factorization.

64206161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71331.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 64206161 is about 8012.8747026270. The cubic root of 64206161 is about 400.4290417268.

The spelling of 64206161 in words is "sixty-four million, two hundred six thousand, one hundred sixty-one".