64821627 has 20 divisors (see below), whose sum is σ = 104282640. Its totient is φ = 39889584.

The previous prime is 64821623. The next prime is 64821643. The reversal of 64821627 is 72612846.

64821627 is a `hidden beast` number, since 6 + 4 + 8 + 21 + 627 = 666.

It is not a de Polignac number, because 64821627 - 2² = 64821623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64821591 and 64821600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64821623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29727 + ... + 31832.

It is an arithmetic number, because the mean of its divisors is an integer number (5214132).

Almost surely, 2^64821627 is an apocalyptic number.

64821627 is a deficient number, since it is larger than the sum of its proper divisors (39461013).

64821627 is a wasteful number, since it uses less digits than its factorization.

64821627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61584 (or 61575 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 64821627 is about 8051.1879247723. The cubic root of 64821627 is about 401.7044497285.

The spelling of 64821627 in words is "sixty-four million, eight hundred twenty-one thousand, six hundred twenty-seven".