2180457261 has 24 divisors (see below), whose sum is σ = 3304471040. Its totient is φ = 1383674400.

The previous prime is 2180457193. The next prime is 2180457269. The reversal of 2180457261 is 1627540812.

2180457261 is a `hidden beast` number, since 2 + 1 + 80 + 4 + 572 + 6 + 1 = 666.

2180457261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2180457261 - 2¹³ = 2180449069 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180457269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47041 + ... + 81078.

Almost surely, 2^2180457261 is an apocalyptic number.

It is an amenable number.

2180457261 is a deficient number, since it is larger than the sum of its proper divisors (1124013779).

2180457261 is a wasteful number, since it uses less digits than its factorization.

2180457261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128217 (or 128214 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2180457261 is about 46695.3665902732. The cubic root of 2180457261 is about 1296.7289084507.

The spelling of 2180457261 in words is "two billion, one hundred eighty million, four hundred fifty-seven thousand, two hundred sixty-one".