2156104773 has 12 divisors (see below), whose sum is σ = 3119912640. Its totient is φ = 1434846696.

The previous prime is 2156104763. The next prime is 2156104807. The reversal of 2156104773 is 3774016512.

It is a happy number.

2156104773 is a `hidden beast` number, since 21 + 561 + 0 + 4 + 7 + 73 = 666.

It is not a de Polignac number, because 2156104773 - 2⁴ = 2156104757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156104723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207693 + ... + 217826.

It is an arithmetic number, because the mean of its divisors is an integer number (259992720).

Almost surely, 2^2156104773 is an apocalyptic number.

It is an amenable number.

2156104773 is a deficient number, since it is larger than the sum of its proper divisors (963807867).

2156104773 is a wasteful number, since it uses less digits than its factorization.

2156104773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426088 (or 426085 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 2156104773 is about 46433.8752744158. The cubic root of 2156104773 is about 1291.8833082968.

It can be divided in two parts, 2156 and 104773, that added together give a square (106929 = 327²).

The spelling of 2156104773 in words is "two billion, one hundred fifty-six million, one hundred four thousand, seven hundred seventy-three".