1722865818012 has 12 divisors (see below), whose sum is σ = 4020020242056. Its totient is φ = 574288606000.

The previous prime is 1722865817927. The next prime is 1722865818013. The reversal of 1722865818012 is 2108185682271.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722865818013) 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, 71786075739 + ... + 71786075762.

It is an arithmetic number, because the mean of its divisors is an integer number (335001686838).

Almost surely, 2^{1722865818012} is an apocalyptic number.

1722865818012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1722865818012 is an abundant number, since it is smaller than the sum of its proper divisors (2297154424044).

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

1722865818012 is a wasteful number, since it uses less digits than its factorization.

1722865818012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143572151508 (or 143572151506 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 1722865818012 in words is "one trillion, seven hundred twenty-two billion, eight hundred sixty-five million, eight hundred eighteen thousand, twelve".