551426421400 has 192 divisors, whose sum is σ = 1368509820480. Its totient is φ = 206183577600.

The previous prime is 551426421391. The next prime is 551426421401. The reversal of 551426421400 is 4124624155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551426421401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44047942 + ... + 44060458.

It is an arithmetic number, because the mean of its divisors is an integer number (7127655315).

Almost surely, 2^551426421400 is an apocalyptic number.

551426421400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551426421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684254910240).

551426421400 is an abundant number, since it is smaller than the sum of its proper divisors (817083399080).

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

551426421400 is a wasteful number, since it uses less digits than its factorization.

551426421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12774 (or 12765 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 551426421400 in words is "five hundred fifty-one billion, four hundred twenty-six million, four hundred twenty-one thousand, four hundred".