5525390878225 has 27 divisors (see below), whose sum is σ = 6882564812529. Its totient is φ = 4400351280000.

The previous prime is 5525390878201. The next prime is 5525390878291. The reversal of 5525390878225 is 5228780935255.

It is a happy number.

The square root of 5525390878225 is 2350615.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2642988278529 + 2882402599696 = 1625727^2 + 1697764^2 .

It is not a de Polignac number, because 5525390878225 - 2¹³ = 5525390870033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2950020889 + ... + 2950022761.

Almost surely, 2^{5525390878225} is an apocalyptic number.

5525390878225 is the 2350615-th square number.

5525390878225 is the 1175308-th centered octagonal number.

It is an amenable number.

5525390878225 is a deficient number, since it is larger than the sum of its proper divisors (1357173934304).

5525390878225 is an frugal number, since it uses more digits than its factorization.

5525390878225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 60480000, while the sum is 61.

The spelling of 5525390878225 in words is "five trillion, five hundred twenty-five billion, three hundred ninety million, eight hundred seventy-eight thousand, two hundred twenty-five".