1685366868654 has 24 divisors (see below), whose sum is σ = 4173289389360. Its totient is φ = 481533391008.

The previous prime is 1685366868629. The next prime is 1685366868719. The reversal of 1685366868654 is 4568686635861.

1685366868654 is a `hidden beast` number, since 1 + 6 + 8 + 536 + 6 + 8 + 6 + 86 + 5 + 4 = 666.

It is a super-2 number, since 2×1685366868654² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6687963639 + ... + 6687963890.

It is an arithmetic number, because the mean of its divisors is an integer number (173887057890).

Almost surely, 2^{1685366868654} is an apocalyptic number.

1685366868654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1685366868654 is an abundant number, since it is smaller than the sum of its proper divisors (2487922520706).

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

1685366868654 is a wasteful number, since it uses less digits than its factorization.

1685366868654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13375927544 (or 13375927541 counting only the distinct ones).

The product of its digits is 1194393600, while the sum is 72.

The spelling of 1685366868654 in words is "one trillion, six hundred eighty-five billion, three hundred sixty-six million, eight hundred sixty-eight thousand, six hundred fifty-four".