1720627106505 has 16 divisors (see below), whose sum is σ = 2897898285120. Its totient is φ = 869369485248.

The previous prime is 1720627106449. The next prime is 1720627106537. The reversal of 1720627106505 is 5056017260271.

It is a happy number.

It is not a de Polignac number, because 1720627106505 - 2⁷ = 1720627106377 is a prime.

It is a super-2 number, since 2×1720627106505² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3018643762 + ... + 3018644331.

It is an arithmetic number, because the mean of its divisors is an integer number (181118642820).

Almost surely, 2^{1720627106505} is an apocalyptic number.

1720627106505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1720627106505 is a deficient number, since it is larger than the sum of its proper divisors (1177271178615).

1720627106505 is a wasteful number, since it uses less digits than its factorization.

1720627106505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037288120.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 1720627106505 in words is "one trillion, seven hundred twenty billion, six hundred twenty-seven million, one hundred six thousand, five hundred five".