11521012642 has 16 divisors (see below), whose sum is σ = 18929048760. Its totient is φ = 5234699008.

The previous prime is 11521012619. The next prime is 11521012667. The reversal of 11521012642 is 24621012511.

It can be written as a sum of positive squares in 4 ways, for example, as 10102059081 + 1418953561 = 100509^2 + 37669^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5841313 + ... + 5843284.

Almost surely, 2^11521012642 is an apocalyptic number.

11521012642 is a deficient number, since it is larger than the sum of its proper divisors (7408036118).

11521012642 is a wasteful number, since it uses less digits than its factorization.

11521012642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11684645.

The product of its (nonzero) digits is 960, while the sum is 25.

The spelling of 11521012642 in words is "eleven billion, five hundred twenty-one million, twelve thousand, six hundred forty-two".