2139122705476 has 9 divisors (see below), whose sum is σ = 3743469853599. Its totient is φ = 1069559890164.

The previous prime is 2139122705459. The next prime is 2139122705627. The reversal of 2139122705476 is 6745072219312.

The square root of 2139122705476 is 1462574.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2559505 + ... + 3290791.

Almost surely, 2^{2139122705476} is an apocalyptic number.

2139122705476 is the 1462574-th square number.

It is an amenable number.

2139122705476 is a deficient number, since it is larger than the sum of its proper divisors (1604347148123).

2139122705476 is an frugal number, since it uses more digits than its factorization.

2139122705476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462578 (or 731289 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

Multiplying 2139122705476 by its sum of digits (49), we get a square (104817012568324 = 10238018²).

The spelling of 2139122705476 in words is "two trillion, one hundred thirty-nine billion, one hundred twenty-two million, seven hundred five thousand, four hundred seventy-six".