27780505055 has 8 divisors (see below), whose sum is σ = 35091164400. Its totient is φ = 21054698496.

The previous prime is 27780505037. The next prime is 27780505073. The reversal of 27780505055 is 55050508772.

It is an interprime number because it is at equal distance from previous prime (27780505037) and next prime (27780505073).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27780505055 - 2¹⁸ = 27780242911 is a prime.

It is a super-2 number, since 2×27780505055² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27780504997 and 27780505015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146213090 + ... + 146213279.

It is an arithmetic number, because the mean of its divisors is an integer number (4386395550).

Almost surely, 2^27780505055 is an apocalyptic number.

27780505055 is a deficient number, since it is larger than the sum of its proper divisors (7310659345).

27780505055 is a wasteful number, since it uses less digits than its factorization.

27780505055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292426393.

The product of its (nonzero) digits is 490000, while the sum is 44.

The spelling of 27780505055 in words is "twenty-seven billion, seven hundred eighty million, five hundred five thousand, fifty-five".