1685463552001 has 4 divisors (see below), whose sum is σ = 1731016621012. Its totient is φ = 1639910482992.

The previous prime is 1685463551999. The next prime is 1685463552011. The reversal of 1685463552001 is 1002553645861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1194377951376 + 491085600625 = 1092876^2 + 700775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685463552001 - 2¹ = 1685463551999 is a prime.

It is a super-2 number, since 2×1685463552001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685463552011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22776534450 + ... + 22776534523.

It is an arithmetic number, because the mean of its divisors is an integer number (432754155253).

Almost surely, 2^{1685463552001} is an apocalyptic number.

It is an amenable number.

1685463552001 is a deficient number, since it is larger than the sum of its proper divisors (45553069011).

1685463552001 is an equidigital number, since it uses as much as digits as its factorization.

1685463552001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45553069010.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 1685463552001 in words is "one trillion, six hundred eighty-five billion, four hundred sixty-three million, five hundred fifty-two thousand, one".