1320190128878 has 16 divisors (see below), whose sum is σ = 2061666785040. Its totient is φ = 633456645696.

The previous prime is 1320190128853. The next prime is 1320190128919. The reversal of 1320190128878 is 8788210910231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122189168 + ... + 122199971.

It is an arithmetic number, because the mean of its divisors is an integer number (128854174065).

Almost surely, 2^{1320190128878} is an apocalyptic number.

1320190128878 is a deficient number, since it is larger than the sum of its proper divisors (741476656162).

1320190128878 is a wasteful number, since it uses less digits than its factorization.

1320190128878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244389251.

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 1320190128878 in words is "one trillion, three hundred twenty billion, one hundred ninety million, one hundred twenty-eight thousand, eight hundred seventy-eight".