2521423554509 has 16 divisors (see below), whose sum is σ = 2578879941120. Its totient is φ = 2464527245760.

The previous prime is 2521423554467. The next prime is 2521423554521. The reversal of 2521423554509 is 9054553241252.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521423554509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521423554599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7410482 + ... + 7743260.

It is an arithmetic number, because the mean of its divisors is an integer number (161179996320).

Almost surely, 2^{2521423554509} is an apocalyptic number.

It is an amenable number.

2521423554509 is a deficient number, since it is larger than the sum of its proper divisors (57456386611).

2521423554509 is a wasteful number, since it uses less digits than its factorization.

2521423554509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333620.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 2521423554509 in words is "two trillion, five hundred twenty-one billion, four hundred twenty-three million, five hundred fifty-four thousand, five hundred nine".