172273263545 has 8 divisors (see below), whose sum is σ = 218888382024. Its totient is φ = 129711633664.

The previous prime is 172273263541. The next prime is 172273263551. The reversal of 172273263545 is 545362372271.

It can be written as a sum of positive squares in 4 ways, for example, as 2355355024 + 169917908521 = 48532^2 + 412211^2 .

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 172273263545 - 2² = 172273263541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172273263545.

It is not an unprimeable number, because it can be changed into a prime (172273263541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1013372054 + ... + 1013372223.

It is an arithmetic number, because the mean of its divisors is an integer number (27361047753).

Almost surely, 2^172273263545 is an apocalyptic number.

It is an amenable number.

172273263545 is a deficient number, since it is larger than the sum of its proper divisors (46615118479).

172273263545 is a wasteful number, since it uses less digits than its factorization.

172273263545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026744299.

The product of its digits is 2116800, while the sum is 47.

The spelling of 172273263545 in words is "one hundred seventy-two billion, two hundred seventy-three million, two hundred sixty-three thousand, five hundred forty-five".