127780655555 has 32 divisors (see below), whose sum is σ = 180826853760. Its totient is φ = 84859822080.

The previous prime is 127780655489. The next prime is 127780655573. The reversal of 127780655555 is 555556087721.

It is not a de Polignac number, because 127780655555 - 2¹⁰ = 127780654531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127780655555.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128390 + ... + 521579.

It is an arithmetic number, because the mean of its divisors is an integer number (5650839180).

Almost surely, 2^127780655555 is an apocalyptic number.

127780655555 is a deficient number, since it is larger than the sum of its proper divisors (53046198205).

127780655555 is a wasteful number, since it uses less digits than its factorization.

127780655555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650159.

The product of its (nonzero) digits is 14700000, while the sum is 56.

The spelling of 127780655555 in words is "one hundred twenty-seven billion, seven hundred eighty million, six hundred fifty-five thousand, five hundred fifty-five".