2165628554 has 8 divisors (see below), whose sum is σ = 3250469088. Its totient is φ = 1082138860.

The previous prime is 2165628551. The next prime is 2165628583. The reversal of 2165628554 is 4558265612.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2165628551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333692 + ... + 340119.

It is an arithmetic number, because the mean of its divisors is an integer number (406308636).

Almost surely, 2^2165628554 is an apocalyptic number.

2165628554 is a deficient number, since it is larger than the sum of its proper divisors (1084840534).

2165628554 is a wasteful number, since it uses less digits than its factorization.

2165628554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675420.

The product of its digits is 576000, while the sum is 44.

The square root of 2165628554 is about 46536.3143577142. The cubic root of 2165628554 is about 1293.7826505206.

The spelling of 2165628554 in words is "two billion, one hundred sixty-five million, six hundred twenty-eight thousand, five hundred fifty-four".