1672172033887 has 4 divisors (see below), whose sum is σ = 1672602898896. Its totient is φ = 1671741168880.

The previous prime is 1672172033879. The next prime is 1672172033921. The reversal of 1672172033887 is 7883302712761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1672172033887 - 2³ = 1672172033879 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 (1672172033827) 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, 215426683 + ... + 215434444.

It is an arithmetic number, because the mean of its divisors is an integer number (418150724724).

Almost surely, 2^{1672172033887} is an apocalyptic number.

1672172033887 is a deficient number, since it is larger than the sum of its proper divisors (430865009).

1672172033887 is an equidigital number, since it uses as much as digits as its factorization.

1672172033887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430865008.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The spelling of 1672172033887 in words is "one trillion, six hundred seventy-two billion, one hundred seventy-two million, thirty-three thousand, eight hundred eighty-seven".