805156172 has 12 divisors (see below), whose sum is σ = 1409377200. Its totient is φ = 402476976.

The previous prime is 805156171. The next prime is 805156181. The reversal of 805156172 is 271651508.

It is a super-2 number, since 2×805156172² = 1296552922619387168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (805156171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5672 + ... + 40527.

It is an arithmetic number, because the mean of its divisors is an integer number (117448100).

Almost surely, 2^805156172 is an apocalyptic number.

It is an amenable number.

805156172 is a deficient number, since it is larger than the sum of its proper divisors (604221028).

805156172 is a wasteful number, since it uses less digits than its factorization.

805156172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50560 (or 50558 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 805156172 is about 28375.2739546246. The cubic root of 805156172 is about 930.3078997466.

The spelling of 805156172 in words is "eight hundred five million, one hundred fifty-six thousand, one hundred seventy-two".