521320151025552 has 40 divisors (see below), whose sum is σ = 1363791112397440. Its totient is φ = 171573720589440.

The previous prime is 521320151025551. The next prime is 521320151025613. The reversal of 521320151025552 is 255520151023125.

It is a self number, because there is not a number n which added to its sum of digits gives 521320151025552.

It is not an unprimeable number, because it can be changed into a prime (521320151025551) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 68739467599 + ... + 68739475182.

It is an arithmetic number, because the mean of its divisors is an integer number (34094777809936).

Almost surely, 2^{521320151025552} is an apocalyptic number.

It is an amenable number.

521320151025552 is an abundant number, since it is smaller than the sum of its proper divisors (842470961371888).

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

521320151025552 is a wasteful number, since it uses less digits than its factorization.

521320151025552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137478942871 (or 137478942865 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 521320151025552 in words is "five hundred twenty-one trillion, three hundred twenty billion, one hundred fifty-one million, twenty-five thousand, five hundred fifty-two".