11278078141225 has 81 divisors (see below), whose sum is σ = 16378491308517. Its totient is φ = 7681391847360.

The previous prime is 11278078141223. The next prime is 11278078141237. The reversal of 11278078141225 is 52214187087211.

The square root of 11278078141225 is 3358285.

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 1539234754281 + 9738843386944 = 1240659^2 + 3120712^2 .

It is not a de Polignac number, because 11278078141225 - 2¹ = 11278078141223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11278078141223) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 26916654066 + ... + 26916654484.

Almost surely, 2^{11278078141225} is an apocalyptic number.

11278078141225 is the 3358285-th square number.

11278078141225 is the 1679143-rd centered octagonal number.

It is an amenable number.

11278078141225 is a deficient number, since it is larger than the sum of its proper divisors (5100413167292).

11278078141225 is an frugal number, since it uses more digits than its factorization.

11278078141225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 49.

Multiplying 11278078141225 by its sum of digits (49), we get a square (552625828920025 = 23507995²).

11278078141225 divided by its sum of digits (49) gives a square (230164860025 = 479755²).

The spelling of 11278078141225 in words is "eleven trillion, two hundred seventy-eight billion, seventy-eight million, one hundred forty-one thousand, two hundred twenty-five".