1697785546081 has 3 divisors (see below), whose sum is σ = 1697786849073. Its totient is φ = 1697784243090.

The previous prime is 1697785546027. The next prime is 1697785546103. The reversal of 1697785546081 is 1806455877961.

The square root of 1697785546081 is 1302991.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1697785546081 - 2⁹ = 1697785545569 is a prime.

It is a super-2 number, since 2×1697785546081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1697785545998 and 1697785546016.

It is not an unprimeable number, because it can be changed into a prime (1697785546381) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 651496 + ... + 1954486.

It is an arithmetic number, because the mean of its divisors is an integer number (565928949691).

Almost surely, 2^{1697785546081} is an apocalyptic number.

1697785546081 is the 1302991-st square number.

1697785546081 is the 651496-th centered octagonal number.

It is an amenable number.

1697785546081 is a deficient number, since it is larger than the sum of its proper divisors (1302992).

1697785546081 is an frugal number, since it uses more digits than its factorization.

1697785546081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605982 (or 1302991 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 67.

The spelling of 1697785546081 in words is "one trillion, six hundred ninety-seven billion, seven hundred eighty-five million, five hundred forty-six thousand, eighty-one".