128992557563 has 8 divisors (see below), whose sum is σ = 135791001600. Its totient is φ = 122195049768.

The previous prime is 128992557553. The next prime is 128992557599. The reversal of 128992557563 is 365755299821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128992557563 - 2¹⁴ = 128992541179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128992557496 and 128992557505.

It is not an unprimeable number, because it can be changed into a prime (128992557553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58118 + ... + 511236.

It is an arithmetic number, because the mean of its divisors is an integer number (16973875200).

Almost surely, 2^128992557563 is an apocalyptic number.

128992557563 is a deficient number, since it is larger than the sum of its proper divisors (6798444037).

128992557563 is a wasteful number, since it uses less digits than its factorization.

128992557563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468121.

The product of its digits is 40824000, while the sum is 62.

The spelling of 128992557563 in words is "one hundred twenty-eight billion, nine hundred ninety-two million, five hundred fifty-seven thousand, five hundred sixty-three".