1521534355345 has 16 divisors (see below), whose sum is σ = 1847416112640. Its totient is φ = 1202923914624.

The previous prime is 1521534355339. The next prime is 1521534355357. The reversal of 1521534355345 is 5435534351251.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1521534355345 - 2³⁹ = 971778541457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1521534355295 and 1521534355304.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4827555 + ... + 5133064.

It is an arithmetic number, because the mean of its divisors is an integer number (115463507040).

Almost surely, 2^{1521534355345} is an apocalyptic number.

It is an amenable number.

1521534355345 is a deficient number, since it is larger than the sum of its proper divisors (325881757295).

1521534355345 is a wasteful number, since it uses less digits than its factorization.

1521534355345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960984.

The product of its digits is 2700000, while the sum is 46.

The spelling of 1521534355345 in words is "one trillion, five hundred twenty-one billion, five hundred thirty-four million, three hundred fifty-five thousand, three hundred forty-five".