11113780525 has 6 divisors (see below), whose sum is σ = 13781087882. Its totient is φ = 8891024400.

The previous prime is 11113780477. The next prime is 11113780547. The reversal of 11113780525 is 52508731111.

It can be written as a sum of positive squares in 3 ways, for example, as 2335402276 + 8778378249 = 48326^2 + 93693^2 .

It is not a de Polignac number, because 11113780525 - 2²⁵ = 11080226093 is a prime.

It is a super-2 number, since 2×11113780525² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 222275586 + ... + 222275635.

Almost surely, 2^11113780525 is an apocalyptic number.

It is an amenable number.

11113780525 is a deficient number, since it is larger than the sum of its proper divisors (2667307357).

11113780525 is an equidigital number, since it uses as much as digits as its factorization.

11113780525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444551231 (or 444551226 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 34.

The spelling of 11113780525 in words is "eleven billion, one hundred thirteen million, seven hundred eighty thousand, five hundred twenty-five".