64261583 has 2 divisors, whose sum is σ = 64261584. Its totient is φ = 64261582.

The previous prime is 64261579. The next prime is 64261607. The reversal of 64261583 is 38516246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64261583 - 2² = 64261579 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64261573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32130791 + 32130792.

It is an arithmetic number, because the mean of its divisors is an integer number (32130792).

Almost surely, 2^64261583 is an apocalyptic number.

64261583 is a deficient number, since it is larger than the sum of its proper divisors (1).

64261583 is an equidigital number, since it uses as much as digits as its factorization.

64261583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 64261583 is about 8016.3322660678. The cubic root of 64261583 is about 400.5442237987.

The spelling of 64261583 in words is "sixty-four million, two hundred sixty-one thousand, five hundred eighty-three".