64136576 has 64 divisors (see below), whose sum is σ = 149230080. Its totient is φ = 26884608.

The previous prime is 64136561. The next prime is 64136591. The reversal of 64136576 is 67563146.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64136561) and next prime (64136591).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×64136576² = 8227000762007552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41351 + ... + 42873.

It is an arithmetic number, because the mean of its divisors is an integer number (2331720).

Almost surely, 2^64136576 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 64136576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74615040).

64136576 is an abundant number, since it is smaller than the sum of its proper divisors (85093504).

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

64136576 is a wasteful number, since it uses less digits than its factorization.

64136576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1579 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 64136576 is about 8008.5314508966. The cubic root of 64136576 is about 400.2843311749.

The spelling of 64136576 in words is "sixty-four million, one hundred thirty-six thousand, five hundred seventy-six".