551554243646 has 24 divisors (see below), whose sum is σ = 963503408376. Its totient is φ = 236110820400.

The previous prime is 551554243619. The next prime is 551554243663. The reversal of 551554243646 is 646342455155.

It is a super-2 number, since 2×551554243646² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 551554243594 and 551554243603.

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 11 ways as a sum of consecutive naturals, for example, 3122780 + ... + 3294671.

It is an arithmetic number, because the mean of its divisors is an integer number (40145975349).

Almost surely, 2^551554243646 is an apocalyptic number.

551554243646 is a deficient number, since it is larger than the sum of its proper divisors (411949164730).

551554243646 is a wasteful number, since it uses less digits than its factorization.

551554243646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6418344 (or 6418337 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 50.

The spelling of 551554243646 in words is "five hundred fifty-one billion, five hundred fifty-four million, two hundred forty-three thousand, six hundred forty-six".