64075661563 has 2 divisors, whose sum is σ = 64075661564. Its totient is φ = 64075661562.

The previous prime is 64075661561. The next prime is 64075661593. The reversal of 64075661563 is 36516657046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64075661563 - 2¹ = 64075661561 is a prime.

It is a super-2 number, since 2×64075661563² (a number of 22 digits) contains 22 as substring.

Together with 64075661561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64075661561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32037830781 + 32037830782.

It is an arithmetic number, because the mean of its divisors is an integer number (32037830782).

Almost surely, 2^64075661563 is an apocalyptic number.

64075661563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64075661563 is an equidigital number, since it uses as much as digits as its factorization.

64075661563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 64075661563 in words is "sixty-four billion, seventy-five million, six hundred sixty-one thousand, five hundred sixty-three".