6405722156 has 12 divisors (see below), whose sum is σ = 11216399040. Its totient is φ = 3201036720.

The previous prime is 6405722153. The next prime is 6405722221. The reversal of 6405722156 is 6512275046.

It is not an unprimeable number, because it can be changed into a prime (6405722153) 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, 448175 + ... + 462246.

It is an arithmetic number, because the mean of its divisors is an integer number (934699920).

Almost surely, 2^6405722156 is an apocalyptic number.

It is an amenable number.

6405722156 is a deficient number, since it is larger than the sum of its proper divisors (4810676884).

6405722156 is a wasteful number, since it uses less digits than its factorization.

6405722156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912184 (or 912182 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 6405722156 is about 80035.7554846582. The cubic root of 6405722156 is about 1857.1886997723.

The spelling of 6405722156 in words is "six billion, four hundred five million, seven hundred twenty-two thousand, one hundred fifty-six".