64715551 has 2 divisors, whose sum is σ = 64715552. Its totient is φ = 64715550.

The previous prime is 64715531. The next prime is 64715593. The reversal of 64715551 is 15551746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64715551 - 2¹³ = 64707359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64715531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32357775 + 32357776.

It is an arithmetic number, because the mean of its divisors is an integer number (32357776).

Almost surely, 2^64715551 is an apocalyptic number.

64715551 is a deficient number, since it is larger than the sum of its proper divisors (1).

64715551 is an equidigital number, since it uses as much as digits as its factorization.

64715551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 34.

The square root of 64715551 is about 8044.5976282223. The cubic root of 64715551 is about 401.4852098043.

The spelling of 64715551 in words is "sixty-four million, seven hundred fifteen thousand, five hundred fifty-one".