551404423040 has 64 divisors (see below), whose sum is σ = 1318828286160. Its totient is φ = 220456845312.

The previous prime is 551404423019. The next prime is 551404423081. The reversal of 551404423040 is 40324404155.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 551404422988 and 551404423006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148447 + ... + 1556193.

Almost surely, 2^551404423040 is an apocalyptic number.

It is an amenable number.

551404423040 is an abundant number, since it is smaller than the sum of its proper divisors (767423863120).

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

551404423040 is a wasteful number, since it uses less digits than its factorization.

551404423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409879 (or 409867 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 551404423040 its reverse (40324404155), we get a palindrome (591728827195).

The spelling of 551404423040 in words is "five hundred fifty-one billion, four hundred four million, four hundred twenty-three thousand, forty".