521423524456 has 32 divisors (see below), whose sum is σ = 1004781636000. Its totient is φ = 253491425856.

The previous prime is 521423524451. The next prime is 521423524463. The reversal of 521423524456 is 654425324125.

It is a super-2 number, since 2×521423524456² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521423524451) 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 7 ways as a sum of consecutive naturals, for example, 171826 + ... + 1035553.

It is an arithmetic number, because the mean of its divisors is an integer number (31399426125).

Almost surely, 2^521423524456 is an apocalyptic number.

It is an amenable number.

521423524456 is a deficient number, since it is larger than the sum of its proper divisors (483358111544).

521423524456 is a wasteful number, since it uses less digits than its factorization.

521423524456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208881 (or 1208877 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 43.

The spelling of 521423524456 in words is "five hundred twenty-one billion, four hundred twenty-three million, five hundred twenty-four thousand, four hundred fifty-six".