64425186 has 64 divisors (see below), whose sum is σ = 167650560. Its totient is φ = 17953920.

The previous prime is 64425167. The next prime is 64425191. The reversal of 64425186 is 68152446.

64425186 is a `hidden beast` number, since 644 + 2 + 5 + 1 + 8 + 6 = 666.

It is a super-2 number, since 2×64425186² = 8301209182269192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64425186.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13420 + ... + 17576.

It is an arithmetic number, because the mean of its divisors is an integer number (2619540).

Almost surely, 2^64425186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64425186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83825280).

64425186 is an abundant number, since it is smaller than the sum of its proper divisors (103225374).

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

64425186 is a wasteful number, since it uses less digits than its factorization.

64425186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216 (or 4210 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 64425186 is about 8026.5301344977. The cubic root of 64425186 is about 400.8838497523.

It can be divided in two parts, 6442 and 5186, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 64425186 in words is "sixty-four million, four hundred twenty-five thousand, one hundred eighty-six".