551020636541 has 4 divisors (see below), whose sum is σ = 551025048000. Its totient is φ = 551016225084.

The previous prime is 551020636519. The next prime is 551020636549. The reversal of 551020636541 is 145636020155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551020636541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551020636495 and 551020636504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551020636549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2012741 + ... + 2270058.

It is an arithmetic number, because the mean of its divisors is an integer number (137756262000).

Almost surely, 2^551020636541 is an apocalyptic number.

It is an amenable number.

551020636541 is a deficient number, since it is larger than the sum of its proper divisors (4411459).

551020636541 is a wasteful number, since it uses less digits than its factorization.

551020636541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411458.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 551020636541 its reverse (145636020155), we get a palindrome (696656656696).

The spelling of 551020636541 in words is "five hundred fifty-one billion, twenty million, six hundred thirty-six thousand, five hundred forty-one".