1797438890125 has 8 divisors (see below), whose sum is σ = 2243203735032. Its totient is φ = 1437951112000.

The previous prime is 1797438890069. The next prime is 1797438890153. The reversal of 1797438890125 is 5210988347971.

It can be written as a sum of positive squares in 4 ways, for example, as 51251073769 + 1746187816356 = 226387^2 + 1321434^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1797438890125 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7189755436 + ... + 7189755685.

It is an arithmetic number, because the mean of its divisors is an integer number (280400466879).

Almost surely, 2^{1797438890125} is an apocalyptic number.

It is an amenable number.

1797438890125 is a deficient number, since it is larger than the sum of its proper divisors (445764844907).

1797438890125 is an equidigital number, since it uses as much as digits as its factorization.

1797438890125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14379511136 (or 14379511126 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 64.

The spelling of 1797438890125 in words is "one trillion, seven hundred ninety-seven billion, four hundred thirty-eight million, eight hundred ninety thousand, one hundred twenty-five".