128998897562 has 8 divisors (see below), whose sum is σ = 193856015892. Its totient is φ = 64380225600.

The previous prime is 128998897561. The next prime is 128998897607. The reversal of 128998897562 is 265798899821.

It can be written as a sum of positive squares in 2 ways, for example, as 120694402921 + 8304494641 = 347411^2 + 91129^2 .

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

It is a super-2 number, since 2×128998897562² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128998897562.

It is not an unprimeable number, because it can be changed into a prime (128998897561) 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, 59610239 + ... + 59612402.

Almost surely, 2^128998897562 is an apocalyptic number.

128998897562 is a deficient number, since it is larger than the sum of its proper divisors (64857118330).

128998897562 is a wasteful number, since it uses less digits than its factorization.

128998897562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119223184.

The product of its digits is 313528320, while the sum is 74.

The spelling of 128998897562 in words is "one hundred twenty-eight billion, nine hundred ninety-eight million, eight hundred ninety-seven thousand, five hundred sixty-two".