1521453020540 has 48 divisors (see below), whose sum is σ = 3305426806080. Its totient is φ = 587559866880.

The previous prime is 1521453020519. The next prime is 1521453020579. The reversal of 1521453020540 is 450203541251.

It is a junction number, because it is equal to n+sod(n) for n = 1521453020497 and 1521453020506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10707560 + ... + 10848720.

It is an arithmetic number, because the mean of its divisors is an integer number (68863058460).

Almost surely, 2^{1521453020540} is an apocalyptic number.

1521453020540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1521453020540 is an abundant number, since it is smaller than the sum of its proper divisors (1783973785540).

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

1521453020540 is a wasteful number, since it uses less digits than its factorization.

1521453020540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159782 (or 159780 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 1521453020540 its reverse (450203541251), we get a palindrome (1971656561791).

The spelling of 1521453020540 in words is "one trillion, five hundred twenty-one billion, four hundred fifty-three million, twenty thousand, five hundred forty".