1361254216673 has 4 divisors (see below), whose sum is σ = 1465966079508. Its totient is φ = 1256542353840.

The previous prime is 1361254216657. The next prime is 1361254216691. The reversal of 1361254216673 is 3766124521631.

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 134148585169 + 1227105631504 = 366263^2 + 1107748^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361254216673 - 2⁴ = 1361254216657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361254216603) 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, 52355931398 + ... + 52355931423.

It is an arithmetic number, because the mean of its divisors is an integer number (366491519877).

Almost surely, 2^{1361254216673} is an apocalyptic number.

1361254216673 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1361254216673 is a deficient number, since it is larger than the sum of its proper divisors (104711862835).

1361254216673 is a wasteful number, since it uses less digits than its factorization.

1361254216673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104711862834.

The product of its digits is 1088640, while the sum is 47.

The spelling of 1361254216673 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-four million, two hundred sixteen thousand, six hundred seventy-three".