1873397817653 has 2 divisors, whose sum is σ = 1873397817654. Its totient is φ = 1873397817652.

The previous prime is 1873397817649. The next prime is 1873397817671. The reversal of 1873397817653 is 3567187933781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1353236644369 + 520161173284 = 1163287^2 + 721222^2 .

It is an emirp because it is prime and its reverse (3567187933781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1873397817653 - 2² = 1873397817649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1873397810653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936698908826 + 936698908827.

It is an arithmetic number, because the mean of its divisors is an integer number (936698908827).

Almost surely, 2^{1873397817653} is an apocalyptic number.

It is an amenable number.

1873397817653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1873397817653 is an equidigital number, since it uses as much as digits as its factorization.

1873397817653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160030080, while the sum is 68.

The spelling of 1873397817653 in words is "one trillion, eight hundred seventy-three billion, three hundred ninety-seven million, eight hundred seventeen thousand, six hundred fifty-three".