1812766378925 has 12 divisors (see below), whose sum is σ = 2290242204180. Its totient is φ = 1422850590720.

The previous prime is 1812766378903. The next prime is 1812766378963. The reversal of 1812766378925 is 5298736672181.

It can be written as a sum of positive squares in 6 ways, for example, as 24581764 + 1812741797161 = 4958^2 + 1346381^2 .

It is not a de Polignac number, because 1812766378925 - 2³⁸ = 1537888471981 is a prime.

It is a super-2 number, since 2×1812766378925² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684061460 + ... + 684064109.

It is an arithmetic number, because the mean of its divisors is an integer number (190853517015).

Almost surely, 2^{1812766378925} is an apocalyptic number.

It is an amenable number.

1812766378925 is a deficient number, since it is larger than the sum of its proper divisors (477475825255).

1812766378925 is a wasteful number, since it uses less digits than its factorization.

1812766378925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368125632 (or 1368125627 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 65.

The spelling of 1812766378925 in words is "one trillion, eight hundred twelve billion, seven hundred sixty-six million, three hundred seventy-eight thousand, nine hundred twenty-five".