3673167781021 has 4 divisors (see below), whose sum is σ = 3673183140000. Its totient is φ = 3673152422044.

The previous prime is 3673167780959. The next prime is 3673167781093. The reversal of 3673167781021 is 1201877613763.

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 3673167781021 - 2¹⁵ = 3673167748253 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 3673167781021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3673167881021) 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, 7314991 + ... + 7800988.

It is an arithmetic number, because the mean of its divisors is an integer number (918295785000).

Almost surely, 2^{3673167781021} is an apocalyptic number.

It is an amenable number.

3673167781021 is a deficient number, since it is larger than the sum of its proper divisors (15358979).

3673167781021 is a wasteful number, since it uses less digits than its factorization.

3673167781021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15358978.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 3673167781021 in words is "three trillion, six hundred seventy-three billion, one hundred sixty-seven million, seven hundred eighty-one thousand, twenty-one".