11533051540 has 24 divisors (see below), whose sum is σ = 24810127272. Its totient is φ = 4500702720.

The previous prime is 11533051513. The next prime is 11533051571. The reversal of 11533051540 is 4515033511.

It can be written as a sum of positive squares in 4 ways, for example, as 473584644 + 11059466896 = 21762^2 + 105164^2 .

It is a super-2 number, since 2×11533051540² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11533051499 and 11533051508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7031529 + ... + 7033168.

It is an arithmetic number, because the mean of its divisors is an integer number (1033755303).

Almost surely, 2^11533051540 is an apocalyptic number.

11533051540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11533051540 is an abundant number, since it is smaller than the sum of its proper divisors (13277075732).

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

11533051540 is a wasteful number, since it uses less digits than its factorization.

11533051540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14064747 (or 14064745 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 11533051540 in words is "eleven billion, five hundred thirty-three million, fifty-one thousand, five hundred forty".