128563763634 has 24 divisors (see below), whose sum is σ = 278567490240. Its totient is φ = 42852638808.

The previous prime is 128563763579. The next prime is 128563763659. The reversal of 128563763634 is 436367365821.

128563763634 is a `hidden beast` number, since 1 + 2 + 8 + 563 + 76 + 3 + 6 + 3 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276379 + ... + 577505.

It is an arithmetic number, because the mean of its divisors is an integer number (11606978760).

Almost surely, 2^128563763634 is an apocalyptic number.

128563763634 is an abundant number, since it is smaller than the sum of its proper divisors (150003726606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128563763634 is a wasteful number, since it uses less digits than its factorization.

128563763634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324854 (or 324851 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The spelling of 128563763634 in words is "one hundred twenty-eight billion, five hundred sixty-three million, seven hundred sixty-three thousand, six hundred thirty-four".