64149998 has 16 divisors (see below), whose sum is σ = 105159600. Its totient is φ = 29107200.

The previous prime is 64149983. The next prime is 64150003. The reversal of 64149998 is 89994146.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11828 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (6572475).

Almost surely, 2^64149998 is an apocalyptic number.

64149998 is a deficient number, since it is larger than the sum of its proper divisors (41009602).

64149998 is a wasteful number, since it uses less digits than its factorization.

64149998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5203.

The product of its digits is 559872, while the sum is 50.

The square root of 64149998 is about 8009.3693884101. The cubic root of 64149998 is about 400.3122520166.

The spelling of 64149998 in words is "sixty-four million, one hundred forty-nine thousand, nine hundred ninety-eight".