1797122888957 has 4 divisors (see below), whose sum is σ = 1960497697056. Its totient is φ = 1633748080860.

The previous prime is 1797122888941. The next prime is 1797122888959. The reversal of 1797122888957 is 7598882217971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1797122888957 - 2⁴ = 1797122888941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1797122888959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81687404033 + ... + 81687404054.

It is an arithmetic number, because the mean of its divisors is an integer number (490124424264).

Almost surely, 2^{1797122888957} is an apocalyptic number.

It is an amenable number.

1797122888957 is a deficient number, since it is larger than the sum of its proper divisors (163374808099).

1797122888957 is a wasteful number, since it uses less digits than its factorization.

1797122888957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163374808098.

The product of its digits is 284497920, while the sum is 74.

The spelling of 1797122888957 in words is "one trillion, seven hundred ninety-seven billion, one hundred twenty-two million, eight hundred eighty-eight thousand, nine hundred fifty-seven".