128563763633 has 4 divisors (see below), whose sum is σ = 128565316608. Its totient is φ = 128562210660.

The previous prime is 128563763579. The next prime is 128563763659. The reversal of 128563763633 is 336367365821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 336367365821 = 141413 ⋅2378617.

It is a cyclic number.

It is not a de Polignac number, because 128563763633 - 2¹⁸ = 128563501489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128563763033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644873 + ... + 820358.

It is an arithmetic number, because the mean of its divisors is an integer number (32141329152).

Almost surely, 2^128563763633 is an apocalyptic number.

It is an amenable number.

128563763633 is a deficient number, since it is larger than the sum of its proper divisors (1552975).

128563763633 is an equidigital number, since it uses as much as digits as its factorization.

128563763633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552974.

The product of its digits is 9797760, while the sum is 53.

The spelling of 128563763633 in words is "one hundred twenty-eight billion, five hundred sixty-three million, seven hundred sixty-three thousand, six hundred thirty-three".