1681255251206 has 16 divisors (see below), whose sum is σ = 2670289221600. Its totient is φ = 791161077120.

The previous prime is 1681255251173. The next prime is 1681255251217. The reversal of 1681255251206 is 6021525521861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035596 + ... + 2105936.

It is an arithmetic number, because the mean of its divisors is an integer number (166893076350).

Almost surely, 2^{1681255251206} is an apocalyptic number.

1681255251206 is a deficient number, since it is larger than the sum of its proper divisors (989033970394).

1681255251206 is a wasteful number, since it uses less digits than its factorization.

1681255251206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116559.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 1681255251206 in words is "one trillion, six hundred eighty-one billion, two hundred fifty-five million, two hundred fifty-one thousand, two hundred six".