11815055642 has 8 divisors (see below), whose sum is σ = 19085859156. Its totient is φ = 5453102592.

The previous prime is 11815055617. The next prime is 11815055647. The reversal of 11815055642 is 24655051811.

It can be written as a sum of positive squares in 2 ways, for example, as 11408589721 + 406465921 = 106811^2 + 20161^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 11815055596 and 11815055605.

It is not an unprimeable number, because it can be changed into a prime (11815055647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227212583 + ... + 227212634.

Almost surely, 2^11815055642 is an apocalyptic number.

11815055642 is a deficient number, since it is larger than the sum of its proper divisors (7270803514).

11815055642 is a wasteful number, since it uses less digits than its factorization.

11815055642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454425232.

The product of its (nonzero) digits is 48000, while the sum is 38.

The spelling of 11815055642 in words is "eleven billion, eight hundred fifteen million, fifty-five thousand, six hundred forty-two".