64276560 has 60 divisors (see below), whose sum is σ = 215864532. Its totient is φ = 17140224.

The previous prime is 64276549. The next prime is 64276567. The reversal of 64276560 is 6567246.

64276560 is a `hidden beast` number, since 642 + 7 + 6 + 5 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28132416 + 36144144 = 5304^2 + 6012^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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 (64276567) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 43917 + ... + 45356.

Almost surely, 2^64276560 is an apocalyptic number.

64276560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64276560 is an abundant number, since it is smaller than the sum of its proper divisors (151587972).

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

64276560 is a wasteful number, since it uses less digits than its factorization.

64276560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89292 (or 89283 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 64276560 is about 8017.2663670356. The cubic root of 64276560 is about 400.5753387333.

The spelling of 64276560 in words is "sixty-four million, two hundred seventy-six thousand, five hundred sixty".