2148782805 has 24 divisors (see below), whose sum is σ = 4011062328. Its totient is φ = 1057862016.

The previous prime is 2148782771. The next prime is 2148782833. The reversal of 2148782805 is 5082878412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 87441201 + 2061341604 = 9351^2 + 45402^2 .

It is not a de Polignac number, because 2148782805 - 2¹⁰ = 2148781781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1835982 + ... + 1837151.

It is an arithmetic number, because the mean of its divisors is an integer number (167127597).

Almost surely, 2^2148782805 is an apocalyptic number.

It is an amenable number.

2148782805 is a deficient number, since it is larger than the sum of its proper divisors (1862279523).

2148782805 is a wasteful number, since it uses less digits than its factorization.

2148782805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673157 (or 3673154 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 45.

The square root of 2148782805 is about 46354.9652680271. The cubic root of 2148782805 is about 1290.4192706022.

The spelling of 2148782805 in words is "two billion, one hundred forty-eight million, seven hundred eighty-two thousand, eight hundred five".