64623105 has 12 divisors (see below), whose sum is σ = 112013460. Its totient is φ = 34465632.

The previous prime is 64623101. The next prime is 64623179. The reversal of 64623105 is 50132646.

64623105 is a `hidden beast` number, since 646 + 2 + 3 + 10 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34680321 + 29942784 = 5889^2 + 5472^2 .

It is not a de Polignac number, because 64623105 - 2² = 64623101 is a prime.

It is a super-2 number, since 2×64623105² = 8352291399682050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64623101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717990 + ... + 718079.

It is an arithmetic number, because the mean of its divisors is an integer number (9334455).

Almost surely, 2^64623105 is an apocalyptic number.

It is an amenable number.

64623105 is a deficient number, since it is larger than the sum of its proper divisors (47390355).

64623105 is a wasteful number, since it uses less digits than its factorization.

64623105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436080 (or 1436077 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 64623105 is about 8038.8497311494. The cubic root of 64623105 is about 401.2939451680.

The spelling of 64623105 in words is "sixty-four million, six hundred twenty-three thousand, one hundred five".