11153520520 has 16 divisors (see below), whose sum is σ = 25095421260. Its totient is φ = 4461408192.

The previous prime is 11153520517. The next prime is 11153520523. The reversal of 11153520520 is 2502535111.

It is an interprime number because it is at equal distance from previous prime (11153520517) and next prime (11153520523).

It can be written as a sum of positive squares in 2 ways, for example, as 10309153156 + 844367364 = 101534^2 + 29058^2 .

It is a super-2 number, since 2×11153520520² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11153520523) 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, 139418967 + ... + 139419046.

Almost surely, 2^11153520520 is an apocalyptic number.

11153520520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11153520520 is an abundant number, since it is smaller than the sum of its proper divisors (13941900740).

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

11153520520 is a wasteful number, since it uses less digits than its factorization.

11153520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278838024 (or 278838020 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 11153520520 in words is "eleven billion, one hundred fifty-three million, five hundred twenty thousand, five hundred twenty".