1771213119145 has 4 divisors (see below), whose sum is σ = 2125455742980. Its totient is φ = 1416970495312.

The previous prime is 1771213119131. The next prime is 1771213119157. The reversal of 1771213119145 is 5419113121771.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 554244514576 + 1216968604569 = 744476^2 + 1103163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1771213119145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177121311910 + ... + 177121311919.

It is an arithmetic number, because the mean of its divisors is an integer number (531363935745).

Almost surely, 2^{1771213119145} is an apocalyptic number.

It is an amenable number.

1771213119145 is a deficient number, since it is larger than the sum of its proper divisors (354242623835).

1771213119145 is an equidigital number, since it uses as much as digits as its factorization.

1771213119145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354242623834.

The product of its digits is 52920, while the sum is 43.

The spelling of 1771213119145 in words is "one trillion, seven hundred seventy-one billion, two hundred thirteen million, one hundred nineteen thousand, one hundred forty-five".