521454326550 has 48 divisors (see below), whose sum is σ = 1293255625152. Its totient is φ = 139049229600.

The previous prime is 521454326539. The next prime is 521454326581. The reversal of 521454326550 is 55623454125.

It is a super-2 number, since 2×521454326550² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5456277 + ... + 5551023.

It is an arithmetic number, because the mean of its divisors is an integer number (26942825524).

Almost surely, 2^521454326550 is an apocalyptic number.

521454326550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

521454326550 is an abundant number, since it is smaller than the sum of its proper divisors (771801298602).

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

521454326550 is a wasteful number, since it uses less digits than its factorization.

521454326550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131453 (or 131448 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 521454326550 in words is "five hundred twenty-one billion, four hundred fifty-four million, three hundred twenty-six thousand, five hundred fifty".