11061644638 has 32 divisors (see below), whose sum is σ = 18935532000. Its totient is φ = 4800069120.

The previous prime is 11061644567. The next prime is 11061644639. The reversal of 11061644638 is 83644616011.

It is a self number, because there is not a number n which added to its sum of digits gives 11061644638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11061644639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40623 + ... + 154186.

It is an arithmetic number, because the mean of its divisors is an integer number (591735375).

Almost surely, 2^11061644638 is an apocalyptic number.

11061644638 is a deficient number, since it is larger than the sum of its proper divisors (7873887362).

11061644638 is a wasteful number, since it uses less digits than its factorization.

11061644638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194940.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 11061644638 in words is "eleven billion, sixty-one million, six hundred forty-four thousand, six hundred thirty-eight".