64475998 has 4 divisors (see below), whose sum is σ = 96714000. Its totient is φ = 32237998.

The previous prime is 64475989. The next prime is 64476011. The reversal of 64475998 is 89957446.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16118998 + ... + 16119001.

It is an arithmetic number, because the mean of its divisors is an integer number (24178500).

Almost surely, 2^64475998 is an apocalyptic number.

64475998 is a deficient number, since it is larger than the sum of its proper divisors (32238002).

64475998 is a wasteful number, since it uses less digits than its factorization.

64475998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32238001.

The product of its digits is 2177280, while the sum is 52.

The square root of 64475998 is about 8029.6947638126. The cubic root of 64475998 is about 400.9892141219.

The spelling of 64475998 in words is "sixty-four million, four hundred seventy-five thousand, nine hundred ninety-eight".