551427935520 has 768 divisors, whose sum is σ = 2245866061824. Its totient is φ = 110370816000.

The previous prime is 551427935501. The next prime is 551427935533. The reversal of 551427935520 is 25539724155.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 551427935520.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 276127162 + ... + 276129158.

It is an arithmetic number, because the mean of its divisors is an integer number (2924304768).

Almost surely, 2^551427935520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551427935520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122933030912).

551427935520 is an abundant number, since it is smaller than the sum of its proper divisors (1694438126304).

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

551427935520 is a wasteful number, since it uses less digits than its factorization.

551427935520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 48.

The spelling of 551427935520 in words is "five hundred fifty-one billion, four hundred twenty-seven million, nine hundred thirty-five thousand, five hundred twenty".