64115805 has 32 divisors (see below), whose sum is σ = 110968704. Its totient is φ = 31424256.

The previous prime is 64115803. The next prime is 64115879. The reversal of 64115805 is 50851146.

It is not a de Polignac number, because 64115805 - 2¹ = 64115803 is a prime.

It is a super-2 number, since 2×64115805² = 8221672901596050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64115803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53422 + ... + 54608.

It is an arithmetic number, because the mean of its divisors is an integer number (3467772).

Almost surely, 2^64115805 is an apocalyptic number.

64115805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64115805 is a deficient number, since it is larger than the sum of its proper divisors (46852899).

64115805 is a wasteful number, since it uses less digits than its factorization.

64115805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 64115805 is about 8007.2345413382. The cubic root of 64115805 is about 400.2411150463.

The spelling of 64115805 in words is "sixty-four million, one hundred fifteen thousand, eight hundred five".