11521234134540 has 144 divisors (see below), whose sum is σ = 37637188295616. Its totient is φ = 2835908928000.

The previous prime is 11521234134523. The next prime is 11521234134649. The reversal of 11521234134540 is 4543143212511.

11521234134540 is a `hidden beast` number, since 1 + 1 + 5 + 21 + 23 + 41 + 34 + 540 = 666.

11521234134540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 11521234134495 and 11521234134504.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110749350 + ... + 110853330.

It is an arithmetic number, because the mean of its divisors is an integer number (261369363164).

Almost surely, 2^{11521234134540} is an apocalyptic number.

11521234134540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11521234134540 is an abundant number, since it is smaller than the sum of its proper divisors (26115954161076).

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

11521234134540 is a wasteful number, since it uses less digits than its factorization.

11521234134540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151360 (or 151355 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 11521234134540 in words is "eleven trillion, five hundred twenty-one billion, two hundred thirty-four million, one hundred thirty-four thousand, five hundred forty".