3656142173 has 4 divisors (see below), whose sum is σ = 3733932480. Its totient is φ = 3578351868.

The previous prime is 3656142163. The next prime is 3656142187. The reversal of 3656142173 is 3712416563.

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 3656142173 - 2⁴ = 3656142157 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 (3656142163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38895083 + ... + 38895176.

It is an arithmetic number, because the mean of its divisors is an integer number (933483120).

Almost surely, 2^3656142173 is an apocalyptic number.

It is an amenable number.

3656142173 is a deficient number, since it is larger than the sum of its proper divisors (77790307).

3656142173 is an equidigital number, since it uses as much as digits as its factorization.

3656142173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77790306.

The product of its digits is 90720, while the sum is 38.

The square root of 3656142173 is about 60466.0414861102. The cubic root of 3656142173 is about 1540.5448924951.

The spelling of 3656142173 in words is "three billion, six hundred fifty-six million, one hundred forty-two thousand, one hundred seventy-three".