65728165555 has 32 divisors (see below), whose sum is σ = 88048558080. Its totient is φ = 46775111040.

The previous prime is 65728165541. The next prime is 65728165561. The reversal of 65728165555 is 55556182756.

It is not a de Polignac number, because 65728165555 - 2²⁷ = 65593947827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65728165496 and 65728165505.

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, 413344 + ... + 549826.

It is an arithmetic number, because the mean of its divisors is an integer number (2751517440).

Almost surely, 2^65728165555 is an apocalyptic number.

65728165555 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65728165555 is a deficient number, since it is larger than the sum of its proper divisors (22320392525).

65728165555 is a wasteful number, since it uses less digits than its factorization.

65728165555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136771.

The product of its digits is 12600000, while the sum is 55.

The spelling of 65728165555 in words is "sixty-five billion, seven hundred twenty-eight million, one hundred sixty-five thousand, five hundred fifty-five".