745178342273 has 4 divisors (see below), whose sum is σ = 745181616900. Its totient is φ = 745175067648.

The previous prime is 745178342137. The next prime is 745178342297. The reversal of 745178342273 is 372243871547.

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 671632699024 + 73545643249 = 819532^2 + 271193^2 .

It is a cyclic number.

It is not a de Polignac number, because 745178342273 - 2⁸ = 745178342017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745178342473) 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, 1268240 + ... + 1760337.

It is an arithmetic number, because the mean of its divisors is an integer number (186295404225).

Almost surely, 2^745178342273 is an apocalyptic number.

It is an amenable number.

745178342273 is a deficient number, since it is larger than the sum of its proper divisors (3274627).

745178342273 is a wasteful number, since it uses less digits than its factorization.

745178342273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274626.

The product of its digits is 7902720, while the sum is 53.

The spelling of 745178342273 in words is "seven hundred forty-five billion, one hundred seventy-eight million, three hundred forty-two thousand, two hundred seventy-three".