1684320234861 has 24 divisors (see below), whose sum is σ = 2505323370592. Its totient is φ = 1005564304800.

The previous prime is 1684320234853. The next prime is 1684320234953.

1684320234861 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1684320234861 - 2³ = 1684320234853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1684320234861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684320234461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34602550 + ... + 34651191.

Almost surely, 2^{1684320234861} is an apocalyptic number.

1684320234861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1684320234861 is a deficient number, since it is larger than the sum of its proper divisors (821003135731).

1684320234861 is a wasteful number, since it uses less digits than its factorization.

1684320234861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69253833 (or 69253822 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The spelling of 1684320234861 in words is "one trillion, six hundred eighty-four billion, three hundred twenty million, two hundred thirty-four thousand, eight hundred sixty-one".