128251087834 has 8 divisors (see below), whose sum is σ = 196850507040. Its totient is φ = 62634252156.

The previous prime is 128251087813. The next prime is 128251087859. The reversal of 128251087834 is 438780152821.

It is a happy number.

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, 745645774 + ... + 745645945.

It is an arithmetic number, because the mean of its divisors is an integer number (24606313380).

Almost surely, 2^128251087834 is an apocalyptic number.

128251087834 is a deficient number, since it is larger than the sum of its proper divisors (68599419206).

128251087834 is a wasteful number, since it uses less digits than its factorization.

128251087834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491291764.

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 128251087834 in words is "one hundred twenty-eight billion, two hundred fifty-one million, eighty-seven thousand, eight hundred thirty-four".