5156621615225 has 6 divisors (see below), whose sum is σ = 6394210802910. Its totient is φ = 4125297292160.

The previous prime is 5156621615183. The next prime is 5156621615227. The reversal of 5156621615225 is 5225161266515.

It can be written as a sum of positive squares in 3 ways, for example, as 1120142823424 + 4036478791801 = 1058368^2 + 2009099^2 .

It is not a de Polignac number, because 5156621615225 - 2¹² = 5156621611129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5156621615225.

It is not an unprimeable number, because it can be changed into a prime (5156621615227) 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 5 ways as a sum of consecutive naturals, for example, 103132432280 + ... + 103132432329.

It is an arithmetic number, because the mean of its divisors is an integer number (1065701800485).

Almost surely, 2^{5156621615225} is an apocalyptic number.

It is an amenable number.

5156621615225 is a deficient number, since it is larger than the sum of its proper divisors (1237589187685).

5156621615225 is a wasteful number, since it uses less digits than its factorization.

5156621615225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206264864619 (or 206264864614 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 47.

The spelling of 5156621615225 in words is "five trillion, one hundred fifty-six billion, six hundred twenty-one million, six hundred fifteen thousand, two hundred twenty-five".