12445400155 has 16 divisors (see below), whose sum is σ = 14985941760. Its totient is φ = 9922061952.

The previous prime is 12445400131. The next prime is 12445400183. The reversal of 12445400155 is 55100454421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12445400155 - 2¹⁹ = 12444875867 is a prime.

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, 2854237 + ... + 2858593.

It is an arithmetic number, because the mean of its divisors is an integer number (936621360).

Almost surely, 2^12445400155 is an apocalyptic number.

12445400155 is a deficient number, since it is larger than the sum of its proper divisors (2540541605).

12445400155 is a wasteful number, since it uses less digits than its factorization.

12445400155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 12445400155 its reverse (55100454421), we get a palindrome (67545854576).

The spelling of 12445400155 in words is "twelve billion, four hundred forty-five million, four hundred thousand, one hundred fifty-five".