12565245280 has 192 divisors, whose sum is σ = 35245808640. Its totient is φ = 4141799424.

The previous prime is 12565245271. The next prime is 12565245289. The reversal of 12565245280 is 8254256521.

It is an interprime number because it is at equal distance from previous prime (12565245271) and next prime (12565245289).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565245289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9191157 + ... + 9192523.

It is an arithmetic number, because the mean of its divisors is an integer number (183571920).

Almost surely, 2^12565245280 is an apocalyptic number.

12565245280 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 12565245280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17622904320).

12565245280 is an abundant number, since it is smaller than the sum of its proper divisors (22680563360).

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

12565245280 is a wasteful number, since it uses less digits than its factorization.

12565245280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701 (or 1693 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 40.

The spelling of 12565245280 in words is "twelve billion, five hundred sixty-five million, two hundred forty-five thousand, two hundred eighty".