11771226642 has 16 divisors (see below), whose sum is σ = 26905660992. Its totient is φ = 3363207600.

The previous prime is 11771226641. The next prime is 11771226661. The reversal of 11771226642 is 24662217711.

It is a self number, because there is not a number n which added to its sum of digits gives 11771226642.

It is not an unprimeable number, because it can be changed into a prime (11771226641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140133609 + ... + 140133692.

It is an arithmetic number, because the mean of its divisors is an integer number (1681603812).

Almost surely, 2^11771226642 is an apocalyptic number.

11771226642 is an abundant number, since it is smaller than the sum of its proper divisors (15134434350).

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

11771226642 is a wasteful number, since it uses less digits than its factorization.

11771226642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280267313.

The product of its digits is 56448, while the sum is 39.

The spelling of 11771226642 in words is "eleven billion, seven hundred seventy-one million, two hundred twenty-six thousand, six hundred forty-two".