1681510551006 has 48 divisors (see below), whose sum is σ = 3972670462080. Its totient is φ = 470352598560.

The previous prime is 1681510550989. The next prime is 1681510551031. The reversal of 1681510551006 is 6001550151861.

It is a super-2 number, since 2×1681510551006² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75365866 + ... + 75388173.

It is an arithmetic number, because the mean of its divisors is an integer number (82763967960).

Almost surely, 2^{1681510551006} is an apocalyptic number.

1681510551006 is an abundant number, since it is smaller than the sum of its proper divisors (2291159911074).

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

1681510551006 is a wasteful number, since it uses less digits than its factorization.

1681510551006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150754081 (or 150754068 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 39.

The spelling of 1681510551006 in words is "one trillion, six hundred eighty-one billion, five hundred ten million, five hundred fifty-one thousand, six".