64145808 has 60 divisors (see below), whose sum is σ = 180228048. Its totient is φ = 21297600.

The previous prime is 64145801. The next prime is 64145813. The reversal of 64145808 is 80854146.

64145808 is a `hidden beast` number, since 64 + 14 + 580 + 8 = 666.

It is a super-2 number, since 2×64145808² = 8229369367945728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64145801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43483 + ... + 44933.

Almost surely, 2^64145808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64145808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90114024).

64145808 is an abundant number, since it is smaller than the sum of its proper divisors (116082240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64145808 is a wasteful number, since it uses less digits than its factorization.

64145808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772 (or 1763 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 64145808 is about 8009.1078154811. The cubic root of 64145808 is about 400.3035362727.

The spelling of 64145808 in words is "sixty-four million, one hundred forty-five thousand, eight hundred eight".