64106849 has 4 divisors (see below), whose sum is σ = 66317460. Its totient is φ = 61896240.

The previous prime is 64106837. The next prime is 64106869. The reversal of 64106849 is 94860146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17430625 + 46676224 = 4175^2 + 6832^2 .

It is a cyclic number.

It is not a de Polignac number, because 64106849 - 2²⁰ = 63058273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64106869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105262 + ... + 1105319.

It is an arithmetic number, because the mean of its divisors is an integer number (16579365).

Almost surely, 2^64106849 is an apocalyptic number.

It is an amenable number.

64106849 is a deficient number, since it is larger than the sum of its proper divisors (2210611).

64106849 is a wasteful number, since it uses less digits than its factorization.

64106849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210610.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 64106849 is about 8006.6752775419. The cubic root of 64106849 is about 400.2224783189. Note that the first 3 decimals are identical.

The spelling of 64106849 in words is "sixty-four million, one hundred six thousand, eight hundred forty-nine".