64151998 has 8 divisors (see below), whose sum is σ = 97859160. Its totient is φ = 31532280.

The previous prime is 64151993. The next prime is 64152007. The reversal of 64151998 is 89915146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64151993) 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, 271713 + ... + 271948.

It is an arithmetic number, because the mean of its divisors is an integer number (12232395).

Almost surely, 2^64151998 is an apocalyptic number.

64151998 is a deficient number, since it is larger than the sum of its proper divisors (33707162).

64151998 is a wasteful number, since it uses less digits than its factorization.

64151998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543722.

The product of its digits is 77760, while the sum is 43.

The square root of 64151998 is about 8009.4942412115. The cubic root of 64151998 is about 400.3164121424.

The spelling of 64151998 in words is "sixty-four million, one hundred fifty-one thousand, nine hundred ninety-eight".