1521427340735 has 16 divisors (see below), whose sum is σ = 1829039286816. Its totient is φ = 1214924715648.

The previous prime is 1521427340729. The next prime is 1521427340753. The reversal of 1521427340735 is 5370437241251.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521427340735 is a prime.

It is a Duffinian number.

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, 29714777 + ... + 29765933.

It is an arithmetic number, because the mean of its divisors is an integer number (114314955426).

Almost surely, 2^{1521427340735} is an apocalyptic number.

1521427340735 is a deficient number, since it is larger than the sum of its proper divisors (307611946081).

1521427340735 is a wasteful number, since it uses less digits than its factorization.

1521427340735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61882.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 1521427340735 in words is "one trillion, five hundred twenty-one billion, four hundred twenty-seven million, three hundred forty thousand, seven hundred thirty-five".