6405722157 has 8 divisors (see below), whose sum is σ = 8912309184. Its totient is φ = 4084808288.

The previous prime is 6405722153. The next prime is 6405722221. The reversal of 6405722157 is 7512275046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6405722157 - 2² = 6405722153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405722153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46418208 + ... + 46418345.

It is an arithmetic number, because the mean of its divisors is an integer number (1114038648).

Almost surely, 2^6405722157 is an apocalyptic number.

It is an amenable number.

6405722157 is a deficient number, since it is larger than the sum of its proper divisors (2506587027).

6405722157 is a wasteful number, since it uses less digits than its factorization.

6405722157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92836579.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 6405722157 is about 80035.7554909054. The cubic root of 6405722157 is about 1857.1886998689.

The spelling of 6405722157 in words is "six billion, four hundred five million, seven hundred twenty-two thousand, one hundred fifty-seven".