128694778094 has 8 divisors (see below), whose sum is σ = 193056856608. Its totient is φ = 64342492560.

The previous prime is 128694778073. The next prime is 128694778097. The reversal of 128694778094 is 490877496821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 128694778094.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128694778097) 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, 2415302 + ... + 2468009.

It is an arithmetic number, because the mean of its divisors is an integer number (24132107076).

Almost surely, 2^128694778094 is an apocalyptic number.

128694778094 is a deficient number, since it is larger than the sum of its proper divisors (64362078514).

128694778094 is a wasteful number, since it uses less digits than its factorization.

128694778094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4896490.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 128694778094 in words is "one hundred twenty-eight billion, six hundred ninety-four million, seven hundred seventy-eight thousand, ninety-four".