64990174 has 4 divisors (see below), whose sum is σ = 97485264. Its totient is φ = 32495086.

The previous prime is 64990171. The next prime is 64990183. The reversal of 64990174 is 47109946.

It is a happy number.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64990171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16247542 + ... + 16247545.

It is an arithmetic number, because the mean of its divisors is an integer number (24371316).

Almost surely, 2^64990174 is an apocalyptic number.

64990174 is a deficient number, since it is larger than the sum of its proper divisors (32495090).

64990174 is a wasteful number, since it uses less digits than its factorization.

64990174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32495089.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 64990174 is about 8061.6483426158. The cubic root of 64990174 is about 402.0523145039.

The spelling of 64990174 in words is "sixty-four million, nine hundred ninety thousand, one hundred seventy-four".