12705544090 has 16 divisors (see below), whose sum is σ = 23658599880. Its totient is φ = 4906968640.

The previous prime is 12705544087. The next prime is 12705544097. The reversal of 12705544090 is 9044550721.

It can be written as a sum of positive squares in 4 ways, for example, as 11423975689 + 1281568401 = 106883^2 + 35799^2 .

It is a super-2 number, since 2×12705544090² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12705544097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21905821 + ... + 21906400.

Almost surely, 2^12705544090 is an apocalyptic number.

12705544090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12705544090 is a deficient number, since it is larger than the sum of its proper divisors (10953055790).

12705544090 is a wasteful number, since it uses less digits than its factorization.

12705544090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43812257.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 12705544090 in words is "twelve billion, seven hundred five million, five hundred forty-four thousand, ninety".