1645201255 has 8 divisors (see below), whose sum is σ = 1974552912. Its totient is φ = 1315953408.

The previous prime is 1645201237. The next prime is 1645201277. The reversal of 1645201255 is 5521025461.

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 1645201255 - 2⁹ = 1645200743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14712 + ... + 59218.

It is an arithmetic number, because the mean of its divisors is an integer number (246819114).

Almost surely, 2^1645201255 is an apocalyptic number.

1645201255 is a deficient number, since it is larger than the sum of its proper divisors (329351657).

1645201255 is an equidigital number, since it uses as much as digits as its factorization.

1645201255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51905.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1645201255 is about 40561.0805452715. The cubic root of 1645201255 is about 1180.5190800125.

The spelling of 1645201255 in words is "one billion, six hundred forty-five million, two hundred one thousand, two hundred fifty-five".