11928778325 has 6 divisors (see below), whose sum is σ = 14791685154. Its totient is φ = 9543022640.

The previous prime is 11928778241. The next prime is 11928778327. The reversal of 11928778325 is 52387782911.

It can be written as a sum of positive squares in 3 ways, for example, as 695746129 + 11233032196 = 26377^2 + 105986^2 .

It is not a de Polignac number, because 11928778325 - 2¹⁸ = 11928516181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11928778327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 238575542 + ... + 238575591.

It is an arithmetic number, because the mean of its divisors is an integer number (2465280859).

Almost surely, 2^11928778325 is an apocalyptic number.

It is an amenable number.

11928778325 is a deficient number, since it is larger than the sum of its proper divisors (2862906829).

11928778325 is an equidigital number, since it uses as much as digits as its factorization.

11928778325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477151143 (or 477151138 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 53.

The spelling of 11928778325 in words is "eleven billion, nine hundred twenty-eight million, seven hundred seventy-eight thousand, three hundred twenty-five".