1672171290245 has 4 divisors (see below), whose sum is σ = 2006605548300. Its totient is φ = 1337737032192.

The previous prime is 1672171290227. The next prime is 1672171290269. The reversal of 1672171290245 is 5420921712761.

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 219936612676 + 1452234677569 = 468974^2 + 1205087^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672171290245 - 2³⁸ = 1397293383301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1672171290245.

It is a congruent number.

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, 167217129020 + ... + 167217129029.

It is an arithmetic number, because the mean of its divisors is an integer number (501651387075).

Almost surely, 2^{1672171290245} is an apocalyptic number.

It is an amenable number.

1672171290245 is a deficient number, since it is larger than the sum of its proper divisors (334434258055).

1672171290245 is an equidigital number, since it uses as much as digits as its factorization.

1672171290245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334434258054.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 1672171290245 in words is "one trillion, six hundred seventy-two billion, one hundred seventy-one million, two hundred ninety thousand, two hundred forty-five".