12540400210 has 16 divisors (see below), whose sum is σ = 24309083736. Its totient is φ = 4630301568.

The previous prime is 12540400207. The next prime is 12540400211. The reversal of 12540400210 is 1200404521.

It can be written as a sum of positive squares in 4 ways, for example, as 10688044689 + 1852355521 = 103383^2 + 43039^2 .

It is not an unprimeable number, because it can be changed into a prime (12540400211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48232179 + ... + 48232438.

Almost surely, 2^12540400210 is an apocalyptic number.

12540400210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12540400210 is a deficient number, since it is larger than the sum of its proper divisors (11768683526).

12540400210 is a wasteful number, since it uses less digits than its factorization.

12540400210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96464637.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 12540400210 its reverse (1200404521), we get a palindrome (13740804731).

The spelling of 12540400210 in words is "twelve billion, five hundred forty million, four hundred thousand, two hundred ten".