6450664155 has 64 divisors (see below), whose sum is σ = 11530512000. Its totient is φ = 3057610752.

The previous prime is 6450664151. The next prime is 6450664159. The reversal of 6450664155 is 5514660546.

It is an interprime number because it is at equal distance from previous prime (6450664151) and next prime (6450664159).

It is not a de Polignac number, because 6450664155 - 2² = 6450664151 is a prime.

It is a super-2 number, since 2×6450664155² = 83222136081203728050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6450664151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2311501 + ... + 2314289.

It is an arithmetic number, because the mean of its divisors is an integer number (180164250).

Almost surely, 2^6450664155 is an apocalyptic number.

6450664155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6450664155 is a deficient number, since it is larger than the sum of its proper divisors (5079847845).

6450664155 is a wasteful number, since it uses less digits than its factorization.

6450664155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248.

The product of its (nonzero) digits is 432000, while the sum is 42.

The square root of 6450664155 is about 80316.0267630315. The cubic root of 6450664155 is about 1861.5218741696.

The spelling of 6450664155 in words is "six billion, four hundred fifty million, six hundred sixty-four thousand, one hundred fifty-five".