64229945 has 16 divisors (see below), whose sum is σ = 83380752. Its totient is φ = 47216640.

The previous prime is 64229933. The next prime is 64229947. The reversal of 64229945 is 54992246.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 565504 + 63664441 = 752^2 + 7979^2 .

It is not a de Polignac number, because 64229945 - 2⁶ = 64229881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64229947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13025 + ... + 17265.

It is an arithmetic number, because the mean of its divisors is an integer number (5211297).

Almost surely, 2^64229945 is an apocalyptic number.

64229945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64229945 is a deficient number, since it is larger than the sum of its proper divisors (19150807).

64229945 is a wasteful number, since it uses less digits than its factorization.

64229945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492.

The product of its digits is 155520, while the sum is 41.

The square root of 64229945 is about 8014.3586767751. The cubic root of 64229945 is about 400.4784794985.

The spelling of 64229945 in words is "sixty-four million, two hundred twenty-nine thousand, nine hundred forty-five".