11540721742 has 8 divisors (see below), whose sum is σ = 18884817432. Its totient is φ = 5245782600.

The previous prime is 11540721713. The next prime is 11540721749. The reversal of 11540721742 is 24712704511.

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 = 11540721698 and 11540721707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11540721749) 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, 262289109 + ... + 262289152.

It is an arithmetic number, because the mean of its divisors is an integer number (2360602179).

Almost surely, 2^11540721742 is an apocalyptic number.

11540721742 is a deficient number, since it is larger than the sum of its proper divisors (7344095690).

11540721742 is a wasteful number, since it uses less digits than its factorization.

11540721742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524578274.

The product of its (nonzero) digits is 15680, while the sum is 34.

The spelling of 11540721742 in words is "eleven billion, five hundred forty million, seven hundred twenty-one thousand, seven hundred forty-two".