64851552 has 72 divisors (see below), whose sum is σ = 186712344. Its totient is φ = 21348864.

The previous prime is 64851551. The next prime is 64851593. The reversal of 64851552 is 25515846.

64851552 is a `hidden beast` number, since 648 + 5 + 1 + 5 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64851551) 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, 22548 + ... + 25260.

It is an arithmetic number, because the mean of its divisors is an integer number (2593227).

Almost surely, 2^64851552 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 64851552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93356172).

64851552 is an abundant number, since it is smaller than the sum of its proper divisors (121860792).

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

64851552 is a wasteful number, since it uses less digits than its factorization.

64851552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2801 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 64851552 is about 8053.0461317442. The cubic root of 64851552 is about 401.7662560363.

The spelling of 64851552 in words is "sixty-four million, eight hundred fifty-one thousand, five hundred fifty-two".