11531645252 has 6 divisors (see below), whose sum is σ = 20180379198. Its totient is φ = 5765822624.

The previous prime is 11531645249. The next prime is 11531645273. The reversal of 11531645252 is 25254613511.

It can be written as a sum of positive squares in only one way, i.e., 8990073856 + 2541571396 = 94816^2 + 50414^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1441455653 + ... + 1441455660.

It is an arithmetic number, because the mean of its divisors is an integer number (3363396533).

Almost surely, 2^11531645252 is an apocalyptic number.

It is an amenable number.

11531645252 is a deficient number, since it is larger than the sum of its proper divisors (8648733946).

11531645252 is a wasteful number, since it uses less digits than its factorization.

11531645252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882911317 (or 2882911315 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The spelling of 11531645252 in words is "eleven billion, five hundred thirty-one million, six hundred forty-five thousand, two hundred fifty-two".