64632761 has 2 divisors, whose sum is σ = 64632762. Its totient is φ = 64632760.

The previous prime is 64632727. The next prime is 64632767. The reversal of 64632761 is 16723646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49266361 + 15366400 = 7019^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 64632761 - 2⁶ = 64632697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64632767) 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 as a sum of consecutive naturals, namely, 32316380 + 32316381.

It is an arithmetic number, because the mean of its divisors is an integer number (32316381).

Almost surely, 2^64632761 is an apocalyptic number.

It is an amenable number.

64632761 is a deficient number, since it is larger than the sum of its proper divisors (1).

64632761 is an equidigital number, since it uses as much as digits as its factorization.

64632761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 64632761 is about 8039.4502921531. The cubic root of 64632761 is about 401.3139313187.

The spelling of 64632761 in words is "sixty-four million, six hundred thirty-two thousand, seven hundred sixty-one".