2055980309161 has 9 divisors (see below), whose sum is σ = 2062125502749. Its totient is φ = 2049853386924.

The previous prime is 2055980309147. The next prime is 2055980309177. The reversal of 2055980309161 is 1619030895502.

The square root of 2055980309161 is 1433869.

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

It is not a de Polignac number, because 2055980309161 - 2⁹ = 2055980308649 is a prime.

It is a super-2 number, since 2×2055980309161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2055980309101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 526227970 + ... + 526231876.

It is an arithmetic number, because the mean of its divisors is an integer number (229125055861).

Almost surely, 2^{2055980309161} is an apocalyptic number.

2055980309161 is the 1433869-th square number.

2055980309161 is the 716935-th centered octagonal number.

It is an amenable number.

2055980309161 is a deficient number, since it is larger than the sum of its proper divisors (6145193588).

2055980309161 is an frugal number, since it uses more digits than its factorization.

2055980309161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8548 (or 4274 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 49.

Multiplying 2055980309161 by its sum of digits (49), we get a square (100743035148889 = 10037083²).

The spelling of 2055980309161 in words is "two trillion, fifty-five billion, nine hundred eighty million, three hundred nine thousand, one hundred sixty-one".