127821616755 has 32 divisors (see below), whose sum is σ = 234112364544. Its totient is φ = 58337387136.

The previous prime is 127821616751. The next prime is 127821616759. The reversal of 127821616755 is 557616128721.

It is an interprime number because it is at equal distance from previous prime (127821616751) and next prime (127821616759).

It is not a de Polignac number, because 127821616755 - 2² = 127821616751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127821616698 and 127821616707.

It is not an unprimeable number, because it can be changed into a prime (127821616751) 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 31 ways as a sum of consecutive naturals, for example, 928579 + ... + 1057308.

It is an arithmetic number, because the mean of its divisors is an integer number (7316011392).

Almost surely, 2^127821616755 is an apocalyptic number.

127821616755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

127821616755 is a deficient number, since it is larger than the sum of its proper divisors (106290747789).

127821616755 is a wasteful number, since it uses less digits than its factorization.

127821616755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986515.

The product of its digits is 1411200, while the sum is 51.

The spelling of 127821616755 in words is "one hundred twenty-seven billion, eight hundred twenty-one million, six hundred sixteen thousand, seven hundred fifty-five".