1636072105 has 16 divisors (see below), whose sum is σ = 2054404944. Its totient is φ = 1249447680.

The previous prime is 1636072073. The next prime is 1636072147. The reversal of 1636072105 is 5012706361.

It can be written as a sum of positive squares in 8 ways, for example, as 451817536 + 1184254569 = 21256^2 + 34413^2 .

It is not a de Polignac number, because 1636072105 - 2⁵ = 1636072073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73626 + ... + 93235.

It is an arithmetic number, because the mean of its divisors is an integer number (128400309).

Almost surely, 2^1636072105 is an apocalyptic number.

It is an amenable number.

1636072105 is a deficient number, since it is larger than the sum of its proper divisors (418332839).

1636072105 is a wasteful number, since it uses less digits than its factorization.

1636072105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166956.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 1636072105 is about 40448.3881631889. The cubic root of 1636072105 is about 1178.3314790815.

Adding to 1636072105 its reverse (5012706361), we get a palindrome (6648778466).

The spelling of 1636072105 in words is "one billion, six hundred thirty-six million, seventy-two thousand, one hundred five".