1681612801 has 8 divisors (see below), whose sum is σ = 1836869184. Its totient is φ = 1526753520.

The previous prime is 1681612799. The next prime is 1681612837. The reversal of 1681612801 is 1082161861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1681612801 - 2¹ = 1681612799 is a prime.

It is a super-2 number, since 2×1681612801² = 5655643224974131202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1681612601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90381 + ... + 107386.

It is an arithmetic number, because the mean of its divisors is an integer number (229608648).

Almost surely, 2^1681612801 is an apocalyptic number.

1681612801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1681612801 is a deficient number, since it is larger than the sum of its proper divisors (155256383).

1681612801 is a wasteful number, since it uses less digits than its factorization.

1681612801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198551.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1681612801 is about 41007.4725019721. The cubic root of 1681612801 is about 1189.1646801267.

The spelling of 1681612801 in words is "one billion, six hundred eighty-one million, six hundred twelve thousand, eight hundred one".