128190139478 has 8 divisors (see below), whose sum is σ = 192298595400. Its totient is φ = 64090607680.

The previous prime is 128190139439. The next prime is 128190139523. The reversal of 128190139478 is 874931091821.

128190139478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×128190139478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 2195003 + ... + 2252646.

It is an arithmetic number, because the mean of its divisors is an integer number (24037324425).

Almost surely, 2^128190139478 is an apocalyptic number.

128190139478 is a deficient number, since it is larger than the sum of its proper divisors (64108455922).

128190139478 is a wasteful number, since it uses less digits than its factorization.

128190139478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462062.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 128190139478 in words is "one hundred twenty-eight billion, one hundred ninety million, one hundred thirty-nine thousand, four hundred seventy-eight".