128819259396 has 81 divisors (see below), whose sum is σ = 333991197813. Its totient is φ = 41863728960.

The previous prime is 128819259367. The next prime is 128819259431. The reversal of 128819259396 is 693952918821.

The square root of 128819259396 is 358914.

It is a perfect power (a square), and thus also a powerful number.

128819259396 is a `hidden beast` number, since 1 + 2 + 8 + 8 + 192 + 59 + 396 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6207233796 + 122612025600 = 78786^2 + 350160^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 88292115 + ... + 88293573.

Almost surely, 2^128819259396 is an apocalyptic number.

128819259396 is the 358914-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128819259396

128819259396 is an abundant number, since it is smaller than the sum of its proper divisors (205171938417).

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

128819259396 is an equidigital number, since it uses as much as digits as its factorization.

128819259396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010 (or 1505 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 128819259396 in words is "one hundred twenty-eight billion, eight hundred nineteen million, two hundred fifty-nine thousand, three hundred ninety-six".