523561894128 has 240 divisors, whose sum is σ = 1870172967936. Its totient is φ = 138082164480.

The previous prime is 523561894127. The next prime is 523561894133. The reversal of 523561894128 is 821498165325.

523561894128 is a `hidden beast` number, since 5 + 2 + 3 + 5 + 618 + 9 + 4 + 12 + 8 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523561894127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386088 + ... + 1093703.

Almost surely, 2^523561894128 is an apocalyptic number.

It is an amenable number.

523561894128 is an abundant number, since it is smaller than the sum of its proper divisors (1346611073808).

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

523561894128 is a wasteful number, since it uses less digits than its factorization.

523561894128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479834 (or 1479816 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 523561894128 in words is "five hundred twenty-three billion, five hundred sixty-one million, eight hundred ninety-four thousand, one hundred twenty-eight".