2156804895 has 16 divisors (see below), whose sum is σ = 3943872000. Its totient is φ = 985967904.

The previous prime is 2156804887. The next prime is 2156804899. The reversal of 2156804895 is 5984086512.

It is not a de Polignac number, because 2156804895 - 2³ = 2156804887 is a prime.

It is a super-2 number, since 2×2156804895² = 9303614710191922050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156804899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10270395 + ... + 10270604.

It is an arithmetic number, because the mean of its divisors is an integer number (246492000).

Almost surely, 2^2156804895 is an apocalyptic number.

2156804895 is a deficient number, since it is larger than the sum of its proper divisors (1787067105).

2156804895 is a wasteful number, since it uses less digits than its factorization.

2156804895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20541014.

The product of its (nonzero) digits is 691200, while the sum is 48.

The square root of 2156804895 is about 46441.4135766774. The cubic root of 2156804895 is about 1292.0231249475.

The spelling of 2156804895 in words is "two billion, one hundred fifty-six million, eight hundred four thousand, eight hundred ninety-five".