11572722642 has 32 divisors (see below), whose sum is σ = 26009601408. Its totient is φ = 3406018176.

The previous prime is 11572722617. The next prime is 11572722649. The reversal of 11572722642 is 24622727511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 11572722642.

It is not an unprimeable number, because it can be changed into a prime (11572722649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3223603 + ... + 3227190.

It is an arithmetic number, because the mean of its divisors is an integer number (812800044).

Almost surely, 2^11572722642 is an apocalyptic number.

11572722642 is an abundant number, since it is smaller than the sum of its proper divisors (14436878766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11572722642 is a wasteful number, since it uses less digits than its factorization.

11572722642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450834.

The product of its digits is 94080, while the sum is 39.

The spelling of 11572722642 in words is "eleven billion, five hundred seventy-two million, seven hundred twenty-two thousand, six hundred forty-two".