2721866102138 has 16 divisors (see below), whose sum is σ = 4348849829184. Its totient is φ = 1273208233920.

The previous prime is 2721866102129. The next prime is 2721866102173. The reversal of 2721866102138 is 8312016681272.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2721866102092 and 2721866102101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239679608 + ... + 239690963.

It is an arithmetic number, because the mean of its divisors is an integer number (271803114324).

Almost surely, 2^{2721866102138} is an apocalyptic number.

2721866102138 is a deficient number, since it is larger than the sum of its proper divisors (1626983727046).

2721866102138 is a wasteful number, since it uses less digits than its factorization.

2721866102138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479370757.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 2721866102138 in words is "two trillion, seven hundred twenty-one billion, eight hundred sixty-six million, one hundred two thousand, one hundred thirty-eight".