1636850945 has 8 divisors (see below), whose sum is σ = 1983669480. Its totient is φ = 1296515200.

The previous prime is 1636850879. The next prime is 1636850951. The reversal of 1636850945 is 5490586361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 552861169 + 1083989776 = 23513^2 + 32924^2 .

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

It is not a de Polignac number, because 1636850945 - 2⁸ = 1636850689 is a prime.

It is a super-2 number, since 2×1636850945² = 5358562032294786050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1636850945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620140 + ... + 1621149.

It is an arithmetic number, because the mean of its divisors is an integer number (247958685).

Almost surely, 2^1636850945 is an apocalyptic number.

It is an amenable number.

1636850945 is a deficient number, since it is larger than the sum of its proper divisors (346818535).

1636850945 is a wasteful number, since it uses less digits than its factorization.

1636850945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241395.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 1636850945 is about 40458.0145953802. The cubic root of 1636850945 is about 1178.5184280753.

The spelling of 1636850945 in words is "one billion, six hundred thirty-six million, eight hundred fifty thousand, nine hundred forty-five".