1245552524320 has 144 divisors (see below), whose sum is σ = 3187324033992. Its totient is φ = 459760803840.

The previous prime is 1245552524309. The next prime is 1245552524329. The reversal of 1245552524320 is 234252555421.

It can be written as a sum of positive squares in 12 ways, for example, as 131354055184 + 1114198469136 = 362428^2 + 1055556^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1245552524329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183354844 + ... + 183361636.

Almost surely, 2^{1245552524320} is an apocalyptic number.

1245552524320 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 1245552524320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593662016996).

1245552524320 is an abundant number, since it is smaller than the sum of its proper divisors (1941771509672).

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

1245552524320 is a wasteful number, since it uses less digits than its factorization.

1245552524320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13615 (or 13594 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 1245552524320 in words is "one trillion, two hundred forty-five billion, five hundred fifty-two million, five hundred twenty-four thousand, three hundred twenty".