1974220101857 has 2 divisors, whose sum is σ = 1974220101858. Its totient is φ = 1974220101856.

The previous prime is 1974220101787. The next prime is 1974220101901. The reversal of 1974220101857 is 7581010224791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1029171699361 + 945048402496 = 1014481^2 + 972136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974220101857 - 2²⁰ = 1974219053281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1974220101257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987110050928 + 987110050929.

It is an arithmetic number, because the mean of its divisors is an integer number (987110050929).

Almost surely, 2^{1974220101857} is an apocalyptic number.

It is an amenable number.

1974220101857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974220101857 is an equidigital number, since it uses as much as digits as its factorization.

1974220101857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 1974220101857 in words is "one trillion, nine hundred seventy-four billion, two hundred twenty million, one hundred one thousand, eight hundred fifty-seven".