11523720801 has 32 divisors (see below), whose sum is σ = 16287384960. Its totient is φ = 7238246400.

The previous prime is 11523720787. The next prime is 11523720821. The reversal of 11523720801 is 10802732511.

11523720801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11523720801 - 2⁷ = 11523720673 is a prime.

It is a super-2 number, since 2×11523720801² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11523720821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458481 + ... + 482961.

It is an arithmetic number, because the mean of its divisors is an integer number (508980780).

Almost surely, 2^11523720801 is an apocalyptic number.

It is an amenable number.

11523720801 is a deficient number, since it is larger than the sum of its proper divisors (4763664159).

11523720801 is a wasteful number, since it uses less digits than its factorization.

11523720801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24657.

The product of its (nonzero) digits is 3360, while the sum is 30.

The spelling of 11523720801 in words is "eleven billion, five hundred twenty-three million, seven hundred twenty thousand, eight hundred one".