6403165155 has 64 divisors (see below), whose sum is σ = 11989969920. Its totient is φ = 3235845888.

The previous prime is 6403165151. The next prime is 6403165159. The reversal of 6403165155 is 5515613046.

6403165155 is a `hidden beast` number, since 640 + 3 + 1 + 6 + 5 + 1 + 5 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (6403165151) and next prime (6403165159).

It is not a de Polignac number, because 6403165155 - 2² = 6403165151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6403165151) 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 63 ways as a sum of consecutive naturals, for example, 322599 + ... + 341871.

It is an arithmetic number, because the mean of its divisors is an integer number (187343280).

Almost surely, 2^6403165155 is an apocalyptic number.

6403165155 is a deficient number, since it is larger than the sum of its proper divisors (5586804765).

6403165155 is a wasteful number, since it uses less digits than its factorization.

6403165155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19417 (or 19411 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 6403165155 is about 80019.7797735035. The cubic root of 6403165155 is about 1856.9415527550.

The spelling of 6403165155 in words is "six billion, four hundred three million, one hundred sixty-five thousand, one hundred fifty-five".