1683770773861 has 24 divisors (see below), whose sum is σ = 1869564375000. Its totient is φ = 1515153024000.

The previous prime is 1683770773813. The next prime is 1683770773879.

1683770773861 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 398735417025 + 1285035356836 = 631455^2 + 1133594^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1683770773861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1683770773793 and 1683770773802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683770770861) 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, 53866765 + ... + 53898013.

It is an arithmetic number, because the mean of its divisors is an integer number (77898515625).

Almost surely, 2^{1683770773861} is an apocalyptic number.

1683770773861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1683770773861 is a deficient number, since it is larger than the sum of its proper divisors (185793601139).

1683770773861 is a wasteful number, since it uses less digits than its factorization.

1683770773861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35781 (or 35770 counting only the distinct ones).

The product of its (nonzero) digits is 49787136, while the sum is 64.

The spelling of 1683770773861 in words is "one trillion, six hundred eighty-three billion, seven hundred seventy million, seven hundred seventy-three thousand, eight hundred sixty-one".