11512257745 has 8 divisors (see below), whose sum is σ = 14291078760. Its totient is φ = 8892226560.

The previous prime is 11512257703. The next prime is 11512257749. The reversal of 11512257745 is 54775221511.

It can be written as a sum of positive squares in 4 ways, for example, as 885122001 + 10627135744 = 29751^2 + 103088^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11512257745 - 2⁹ = 11512257233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11512257698 and 11512257707.

It is not an unprimeable number, because it can be changed into a prime (11512257749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39697296 + ... + 39697585.

It is an arithmetic number, because the mean of its divisors is an integer number (1786384845).

Almost surely, 2^11512257745 is an apocalyptic number.

It is an amenable number.

11512257745 is a deficient number, since it is larger than the sum of its proper divisors (2778821015).

11512257745 is an equidigital number, since it uses as much as digits as its factorization.

11512257745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79394915.

The product of its digits is 98000, while the sum is 40.

The spelling of 11512257745 in words is "eleven billion, five hundred twelve million, two hundred fifty-seven thousand, seven hundred forty-five".