64681151 has 2 divisors, whose sum is σ = 64681152. Its totient is φ = 64681150.

The previous prime is 64681121. The next prime is 64681157. The reversal of 64681151 is 15118646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64681151 - 2²² = 60486847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64681157) 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, 32340575 + 32340576.

It is an arithmetic number, because the mean of its divisors is an integer number (32340576).

Almost surely, 2^64681151 is an apocalyptic number.

64681151 is a deficient number, since it is larger than the sum of its proper divisors (1).

64681151 is an equidigital number, since it uses as much as digits as its factorization.

64681151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 64681151 is about 8042.4592631856. The cubic root of 64681151 is about 401.4140597800.

Adding to 64681151 its reverse (15118646), we get a palindrome (79799797).

The spelling of 64681151 in words is "sixty-four million, six hundred eighty-one thousand, one hundred fifty-one".