64145446 has 4 divisors (see below), whose sum is σ = 96218172. Its totient is φ = 32072722.

The previous prime is 64145441. The next prime is 64145489. The reversal of 64145446 is 64454146.

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

It is a super-2 number, since 2×64145446² = 8229276485077832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64145441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16036360 + ... + 16036363.

It is an arithmetic number, because the mean of its divisors is an integer number (24054543).

Almost surely, 2^64145446 is an apocalyptic number.

64145446 is a deficient number, since it is larger than the sum of its proper divisors (32072726).

64145446 is a wasteful number, since it uses less digits than its factorization.

64145446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32072725.

The product of its digits is 46080, while the sum is 34.

The square root of 64145446 is about 8009.0852161779. The cubic root of 64145446 is about 400.3027832479.

The spelling of 64145446 in words is "sixty-four million, one hundred forty-five thousand, four hundred forty-six".