2781804506 has 32 divisors (see below), whose sum is σ = 4693489920. Its totient is φ = 1226928384.

The previous prime is 2781804427. The next prime is 2781804527. The reversal of 2781804506 is 6054081872.

It is a super-3 number, since 3×2781804506³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1064930 + ... + 1067538.

It is an arithmetic number, because the mean of its divisors is an integer number (146671560).

Almost surely, 2^2781804506 is an apocalyptic number.

2781804506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2781804506 is a deficient number, since it is larger than the sum of its proper divisors (1911685414).

2781804506 is a wasteful number, since it uses less digits than its factorization.

2781804506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 2781804506 is about 52742.8147333834. The cubic root of 2781804506 is about 1406.4000357028.

The spelling of 2781804506 in words is "two billion, seven hundred eighty-one million, eight hundred four thousand, five hundred six".