2109230477761 has 27 divisors (see below), whose sum is σ = 2396172902529. Its totient is φ = 1855192290600.

The previous prime is 2109230477693. The next prime is 2109230477813. The reversal of 2109230477761 is 1677740329012.

The square root of 2109230477761 is 1452319.

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

It is not a de Polignac number, because 2109230477761 - 2¹¹ = 2109230475713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109230477161) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 495238650 + ... + 495242908.

Almost surely, 2^{2109230477761} is an apocalyptic number.

2109230477761 is the 1452319-th square number.

2109230477761 is the 726160-th centered octagonal number.

It is an amenable number.

2109230477761 is a deficient number, since it is larger than the sum of its proper divisors (286942424768).

2109230477761 is an frugal number, since it uses more digits than its factorization.

2109230477761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8602 (or 4301 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 49.

Multiplying 2109230477761 by its sum of digits (49), we get a square (103352293410289 = 10166233²).

The spelling of 2109230477761 in words is "two trillion, one hundred nine billion, two hundred thirty million, four hundred seventy-seven thousand, seven hundred sixty-one".