64836819 has 12 divisors (see below), whose sum is σ = 95831736. Its totient is φ = 42219072.

The previous prime is 64836817. The next prime is 64836823. The reversal of 64836819 is 91863846.

It is not a de Polignac number, because 64836819 - 2¹ = 64836817 is a prime.

It is a super-2 number, since 2×64836819² = 8407626196077522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64836817) 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, 83382 + ... + 84155.

It is an arithmetic number, because the mean of its divisors is an integer number (7985978).

Almost surely, 2^64836819 is an apocalyptic number.

64836819 is a deficient number, since it is larger than the sum of its proper divisors (30994917).

64836819 is a wasteful number, since it uses less digits than its factorization.

64836819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167586 (or 167583 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 64836819 is about 8052.1313327590. The cubic root of 64836819 is about 401.7358292623.

The spelling of 64836819 in words is "sixty-four million, eight hundred thirty-six thousand, eight hundred nineteen".