11321666542 has 4 divisors (see below), whose sum is σ = 16982499816. Its totient is φ = 5660833270.

The previous prime is 11321666483. The next prime is 11321666549. The reversal of 11321666542 is 24566612311.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321666549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830416634 + ... + 2830416637.

It is an arithmetic number, because the mean of its divisors is an integer number (4245624954).

Almost surely, 2^11321666542 is an apocalyptic number.

11321666542 is a deficient number, since it is larger than the sum of its proper divisors (5660833274).

11321666542 is an equidigital number, since it uses as much as digits as its factorization.

11321666542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660833273.

The product of its digits is 51840, while the sum is 37.

The spelling of 11321666542 in words is "eleven billion, three hundred twenty-one million, six hundred sixty-six thousand, five hundred forty-two".