2166154653 has 8 divisors (see below), whose sum is σ = 3110375968. Its totient is φ = 1333018224.

The previous prime is 2166154643. The next prime is 2166154657. The reversal of 2166154653 is 3564516612.

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

It is not a de Polignac number, because 2166154653 - 2⁹ = 2166154141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 55542427 = 2166154653 / (2 + 1 + 6 + 6 + 1 + 5 + 4 + 6 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166154657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27771175 + ... + 27771252.

It is an arithmetic number, because the mean of its divisors is an integer number (388796996).

Almost surely, 2^2166154653 is an apocalyptic number.

It is an amenable number.

2166154653 is a deficient number, since it is larger than the sum of its proper divisors (944221315).

2166154653 is a wasteful number, since it uses less digits than its factorization.

2166154653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55542443.

The product of its digits is 129600, while the sum is 39.

The square root of 2166154653 is about 46541.9665785622. The cubic root of 2166154653 is about 1293.8874088131.

The spelling of 2166154653 in words is "two billion, one hundred sixty-six million, one hundred fifty-four thousand, six hundred fifty-three".