11540721633 has 32 divisors (see below), whose sum is σ = 18253627392. Its totient is φ = 6346641600.

The previous prime is 11540721611. The next prime is 11540721683. The reversal of 11540721633 is 33612704511.

It is not a de Polignac number, because 11540721633 - 2⁵ = 11540721601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11540721594 and 11540721603.

It is not an unprimeable number, because it can be changed into a prime (11540721683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68860 + ... + 166802.

It is an arithmetic number, because the mean of its divisors is an integer number (570425856).

Almost surely, 2^11540721633 is an apocalyptic number.

It is an amenable number.

11540721633 is a deficient number, since it is larger than the sum of its proper divisors (6712905759).

11540721633 is a wasteful number, since it uses less digits than its factorization.

11540721633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98165.

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 11540721633 in words is "eleven billion, five hundred forty million, seven hundred twenty-one thousand, six hundred thirty-three".