19812560122485 has 120 divisors (see below), whose sum is σ = 39497399991720. Its totient is φ = 9490256275968.

The previous prime is 19812560122463. The next prime is 19812560122549. The reversal of 19812560122485 is 58422106521891.

It is a happy number.

19812560122485 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 2 + 5 + 601 + 2 + 24 + 8 + 5 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 11302889348529 + 8509670773956 = 3361977^2 + 2917134^2 .

It is not a de Polignac number, because 19812560122485 - 2¹² = 19812560118389 is a prime.

It is a super-3 number, since 3×19812560122485³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1379250 + ... + 6444179.

It is an arithmetic number, because the mean of its divisors is an integer number (329144999931).

Almost surely, 2^{19812560122485} is an apocalyptic number.

19812560122485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19812560122485 is a deficient number, since it is larger than the sum of its proper divisors (19684839869235).

19812560122485 is a wasteful number, since it uses less digits than its factorization.

19812560122485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7823509 (or 7823487 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 19812560122485 in words is "nineteen trillion, eight hundred twelve billion, five hundred sixty million, one hundred twenty-two thousand, four hundred eighty-five".