64105918 has 4 divisors (see below), whose sum is σ = 96158880. Its totient is φ = 32052958.

The previous prime is 64105913. The next prime is 64105927. The reversal of 64105918 is 81950146.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64105913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16026478 + ... + 16026481.

It is an arithmetic number, because the mean of its divisors is an integer number (24039720).

Almost surely, 2^64105918 is an apocalyptic number.

64105918 is a deficient number, since it is larger than the sum of its proper divisors (32052962).

64105918 is a wasteful number, since it uses less digits than its factorization.

64105918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32052961.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 64105918 is about 8006.6171383425. The cubic root of 64105918 is about 400.2205408820.

The spelling of 64105918 in words is "sixty-four million, one hundred five thousand, nine hundred eighteen".