1681698798976 has 64 divisors (see below), whose sum is σ = 4030387200000. Its totient is φ = 682794994176.

The previous prime is 1681698798973. The next prime is 1681698799003. The reversal of 1681698798976 is 6798978961861.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1681698798976² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1681698798893 and 1681698798902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681698798973) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 49374976 + ... + 49409023.

It is an arithmetic number, because the mean of its divisors is an integer number (62974800000).

Almost surely, 2^{1681698798976} is an apocalyptic number.

1681698798976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1681698798976 is an abundant number, since it is smaller than the sum of its proper divisors (2348688401024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681698798976 is an equidigital number, since it uses as much as digits as its factorization.

1681698798976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98784039 (or 98784027 counting only the distinct ones).

The product of its digits is 3950456832, while the sum is 85.

The spelling of 1681698798976 in words is "one trillion, six hundred eighty-one billion, six hundred ninety-eight million, seven hundred ninety-eight thousand, nine hundred seventy-six".