3551217272055 has 12 divisors (see below), whose sum is σ = 6155443271640. Its totient is φ = 1893982545072.

The previous prime is 3551217271961. The next prime is 3551217272159. The reversal of 3551217272055 is 5502727121553.

3551217272055 is a `hidden beast` number, since 3 + 5 + 512 + 17 + 2 + 72 + 0 + 55 = 666.

It is not a de Polignac number, because 3551217272055 - 2¹³ = 3551217263863 is a prime.

It is a super-2 number, since 2×3551217272055² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 78915939379 = 3551217272055 / (3 + 5 + 5 + 1 + 2 + 1 + 7 + 2 + 7 + 2 + 0 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 3551217272055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39457969645 + ... + 39457969734.

It is an arithmetic number, because the mean of its divisors is an integer number (512953605970).

Almost surely, 2^{3551217272055} is an apocalyptic number.

3551217272055 is a deficient number, since it is larger than the sum of its proper divisors (2604225999585).

3551217272055 is a wasteful number, since it uses less digits than its factorization.

3551217272055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78915939390 (or 78915939387 counting only the distinct ones).

The product of its (nonzero) digits is 735000, while the sum is 45.

The spelling of 3551217272055 in words is "three trillion, five hundred fifty-one billion, two hundred seventeen million, two hundred seventy-two thousand, fifty-five".