64612161 has 10 divisors (see below), whose sum is σ = 96519522. Its totient is φ = 43074720.

The previous prime is 64612151. The next prime is 64612183. The reversal of 64612161 is 16121646.

64612161 is a `hidden beast` number, since 646 + 1 + 2 + 16 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59907600 + 4704561 = 7740^2 + 2169^2 .

It is not a de Polignac number, because 64612161 - 2⁹ = 64611649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64612151) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 398760 + ... + 398921.

Almost surely, 2^64612161 is an apocalyptic number.

It is an amenable number.

64612161 is a deficient number, since it is larger than the sum of its proper divisors (31907361).

64612161 is an equidigital number, since it uses as much as digits as its factorization.

64612161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797693 (or 797684 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 64612161 is about 8038.1690079271. The cubic root of 64612161 is about 401.2712906862.

The spelling of 64612161 in words is "sixty-four million, six hundred twelve thousand, one hundred sixty-one".