551555520245111 has 4 divisors (see below), whose sum is σ = 551556657145272. Its totient is φ = 551554383344952.

The previous prime is 551555520245099. The next prime is 551555520245117. The reversal of 551555520245111 is 111542025555155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551555520245111 - 2¹⁸ = 551555519982967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551555520245117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567722060 + ... + 568692753.

It is an arithmetic number, because the mean of its divisors is an integer number (137889164286318).

Almost surely, 2^{551555520245111} is an apocalyptic number.

551555520245111 is a deficient number, since it is larger than the sum of its proper divisors (1136900161).

551555520245111 is a wasteful number, since it uses less digits than its factorization.

551555520245111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136900160.

The product of its (nonzero) digits is 1250000, while the sum is 47.

The spelling of 551555520245111 in words is "five hundred fifty-one trillion, five hundred fifty-five billion, five hundred twenty million, two hundred forty-five thousand, one hundred eleven".