1644268095 has 12 divisors (see below), whose sum is σ = 2850064776. Its totient is φ = 876942960.

The previous prime is 1644268081. The next prime is 1644268103. The reversal of 1644268095 is 5908624461.

1644268095 is a `hidden beast` number, since 1 + 64 + 426 + 80 + 95 = 666.

It is not a de Polignac number, because 1644268095 - 2⁴ = 1644268079 is a prime.

It is a super-3 number, since 3×1644268095³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 36539291 = 1644268095 / (1 + 6 + 4 + 4 + 2 + 6 + 8 + 0 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1644268095.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18269601 + ... + 18269690.

It is an arithmetic number, because the mean of its divisors is an integer number (237505398).

Almost surely, 2^1644268095 is an apocalyptic number.

1644268095 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1644268095 is a deficient number, since it is larger than the sum of its proper divisors (1205796681).

1644268095 is a wasteful number, since it uses less digits than its factorization.

1644268095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36539302 (or 36539299 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 1644268095 is about 40549.5757684344. The cubic root of 1644268095 is about 1180.2958405505.

The spelling of 1644268095 in words is "one billion, six hundred forty-four million, two hundred sixty-eight thousand, ninety-five".