1225806385860 has 216 divisors, whose sum is σ = 4442256786240. Its totient is φ = 268002244224.

The previous prime is 1225806385819. The next prime is 1225806385901. The reversal of 1225806385860 is 685836085221.

1225806385860 is a `hidden beast` number, since 1 + 2 + 2 + 58 + 0 + 6 + 3 + 8 + 586 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1225806385819) and next prime (1225806385901).

It is a junction number, because it is equal to n+sod(n) for n = 1225806385797 and 1225806385806.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 252990 + ... + 1586069.

It is an arithmetic number, because the mean of its divisors is an integer number (20566003640).

Almost surely, 2^{1225806385860} is an apocalyptic number.

1225806385860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225806385860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221128393120).

1225806385860 is an abundant number, since it is smaller than the sum of its proper divisors (3216450400380).

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

1225806385860 is a wasteful number, since it uses less digits than its factorization.

1225806385860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839127 (or 1839099 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 1225806385860 in words is "one trillion, two hundred twenty-five billion, eight hundred six million, three hundred eighty-five thousand, eight hundred sixty".