128633425449994 has 8 divisors (see below), whose sum is σ = 194720322929220. Its totient is φ = 63726651140256.

The previous prime is 128633425449967. The next prime is 128633425450021. The reversal of 128633425449994 is 499944524336821.

It is an interprime number because it is at equal distance from previous prime (128633425449967) and next prime (128633425450021).

It can be written as a sum of positive squares in 2 ways, for example, as 111062363963769 + 17571061486225 = 10538613^2 + 4191785^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295030792099 + ... + 295030792534.

Almost surely, 2^{128633425449994} is an apocalyptic number.

128633425449994 is a deficient number, since it is larger than the sum of its proper divisors (66086897479226).

128633425449994 is a wasteful number, since it uses less digits than its factorization.

128633425449994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590061584744.

The product of its digits is 1612431360, while the sum is 73.

It can be divided in two parts, 1286334 and 25449994, that added together give a triangular number (26736328 = T₇₃₁₂).

The spelling of 128633425449994 in words is "one hundred twenty-eight trillion, six hundred thirty-three billion, four hundred twenty-five million, four hundred forty-nine thousand, nine hundred ninety-four".