2167621653 has 8 divisors (see below), whose sum is σ = 2968274848. Its totient is φ = 1406024784.

The previous prime is 2167621639. The next prime is 2167621657. The reversal of 2167621653 is 3561267612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2167621653 - 2²⁸ = 1899186197 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 (2167621657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9763951 + ... + 9764172.

It is an arithmetic number, because the mean of its divisors is an integer number (371034356).

Almost surely, 2^2167621653 is an apocalyptic number.

It is an amenable number.

2167621653 is a deficient number, since it is larger than the sum of its proper divisors (800653195).

2167621653 is a wasteful number, since it uses less digits than its factorization.

2167621653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19528163.

The product of its digits is 90720, while the sum is 39.

The square root of 2167621653 is about 46557.7238812208. The cubic root of 2167621653 is about 1294.1794323600.

The spelling of 2167621653 in words is "two billion, one hundred sixty-seven million, six hundred twenty-one thousand, six hundred fifty-three".