1777123665313 has 8 divisors (see below), whose sum is σ = 1795690091048. Its totient is φ = 1758562251264.

The previous prime is 1777123665299. The next prime is 1777123665323. The reversal of 1777123665313 is 3135663217771.

It can be written as a sum of positive squares in 4 ways, for example, as 101944826944 + 1675178838369 = 319288^2 + 1294287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1777123665313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1777123665323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537906 + ... + 1960507.

It is an arithmetic number, because the mean of its divisors is an integer number (224461261381).

Almost surely, 2^{1777123665313} is an apocalyptic number.

It is an amenable number.

1777123665313 is a deficient number, since it is larger than the sum of its proper divisors (18566425735).

1777123665313 is an equidigital number, since it uses as much as digits as its factorization.

1777123665313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505843.

The product of its digits is 3333960, while the sum is 52.

The spelling of 1777123665313 in words is "one trillion, seven hundred seventy-seven billion, one hundred twenty-three million, six hundred sixty-five thousand, three hundred thirteen".