1215374745173 has 8 divisors (see below), whose sum is σ = 1286877298392. Its totient is φ = 1143873294336.

The previous prime is 1215374745113. The next prime is 1215374745187. The reversal of 1215374745173 is 3715474735121.

It can be written as a sum of positive squares in 4 ways, for example, as 1054495729 + 1214320249444 = 32473^2 + 1101962^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1215374745173 - 2²² = 1215370550869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215374745113) 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, 3379061 + ... + 3721397.

It is an arithmetic number, because the mean of its divisors is an integer number (160859662299).

Almost surely, 2^{1215374745173} is an apocalyptic number.

It is an amenable number.

1215374745173 is a deficient number, since it is larger than the sum of its proper divisors (71502553219).

1215374745173 is a wasteful number, since it uses less digits than its factorization.

1215374745173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551191.

The product of its digits is 2469600, while the sum is 50.

The spelling of 1215374745173 in words is "one trillion, two hundred fifteen billion, three hundred seventy-four million, seven hundred forty-five thousand, one hundred seventy-three".