1673540711081 has 4 divisors (see below), whose sum is σ = 1673544438672. Its totient is φ = 1673536983492.

The previous prime is 1673540711069. The next prime is 1673540711179. The reversal of 1673540711081 is 1801170453761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1673540711081 - 2¹⁴ = 1673540694697 is a prime.

It is a super-3 number, since 3×1673540711081³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1673540711021) 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, 1080671 + ... + 2124836.

It is an arithmetic number, because the mean of its divisors is an integer number (418386109668).

Almost surely, 2^{1673540711081} is an apocalyptic number.

It is an amenable number.

1673540711081 is a deficient number, since it is larger than the sum of its proper divisors (3727591).

1673540711081 is an equidigital number, since it uses as much as digits as its factorization.

1673540711081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727590.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 1673540711081 in words is "one trillion, six hundred seventy-three billion, five hundred forty million, seven hundred eleven thousand, eighty-one".