1172790128389 has 32 divisors (see below), whose sum is σ = 1384083192960. Its totient is φ = 982091692800.

The previous prime is 1172790128369. The next prime is 1172790128399. The reversal of 1172790128389 is 9838210972711.

It is a cyclic number.

It is not a de Polignac number, because 1172790128389 - 2¹⁹ = 1172789604101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172790128309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11494579 + ... + 11596159.

It is an arithmetic number, because the mean of its divisors is an integer number (43252599780).

Almost surely, 2^{1172790128389} is an apocalyptic number.

1172790128389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1172790128389 is a deficient number, since it is larger than the sum of its proper divisors (211293064571).

1172790128389 is a wasteful number, since it uses less digits than its factorization.

1172790128389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103141.

The product of its (nonzero) digits is 3048192, while the sum is 58.

The spelling of 1172790128389 in words is "one trillion, one hundred seventy-two billion, seven hundred ninety million, one hundred twenty-eight thousand, three hundred eighty-nine".