551377344672 has 480 divisors, whose sum is σ = 2040690516480. Its totient is φ = 141870942720.

The previous prime is 551377344671. The next prime is 551377344733. The reversal of 551377344672 is 276443773155.

551377344672 is a `hidden beast` number, since 55 + 13 + 7 + 73 + 446 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (551377344671) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 21342579 + ... + 21368397.

It is an arithmetic number, because the mean of its divisors is an integer number (4251438576).

Almost surely, 2^551377344672 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 551377344672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1020345258240).

551377344672 is an abundant number, since it is smaller than the sum of its proper divisors (1489313171808).

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

551377344672 is a wasteful number, since it uses less digits than its factorization.

551377344672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25966 (or 25949 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 54.

The spelling of 551377344672 in words is "five hundred fifty-one billion, three hundred seventy-seven million, three hundred forty-four thousand, six hundred seventy-two".