1521116043540 has 192 divisors, whose sum is σ = 4442594956800. Its totient is φ = 388546689024.

The previous prime is 1521116043529. The next prime is 1521116043547. The reversal of 1521116043540 is 453406111251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521116043547) 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 63 ways as a sum of consecutive naturals, for example, 37970841 + ... + 38010879.

It is an arithmetic number, because the mean of its divisors is an integer number (23138515400).

Almost surely, 2^{1521116043540} is an apocalyptic number.

1521116043540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1521116043540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221297478400).

1521116043540 is an abundant number, since it is smaller than the sum of its proper divisors (2921478913260).

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

1521116043540 is a wasteful number, since it uses less digits than its factorization.

1521116043540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40354 (or 40352 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 1521116043540 in words is "one trillion, five hundred twenty-one billion, one hundred sixteen million, forty-three thousand, five hundred forty".