1224540157896 has 144 divisors (see below), whose sum is σ = 3738435040080. Its totient is φ = 359102462400.

The previous prime is 1224540157873. The next prime is 1224540157933. The reversal of 1224540157896 is 6987510454221.

1224540157896 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 540 + 1 + 5 + 7 + 8 + 96 = 666.

It is a super-3 number, since 3×1224540157896³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43330 + ... + 1565553.

It is an arithmetic number, because the mean of its divisors is an integer number (25961354445).

Almost surely, 2^{1224540157896} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224540157896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1869217520040).

1224540157896 is an abundant number, since it is smaller than the sum of its proper divisors (2513894882184).

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

1224540157896 is a wasteful number, since it uses less digits than its factorization.

1224540157896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608968 (or 1608930 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 1224540157896 in words is "one trillion, two hundred twenty-four billion, five hundred forty million, one hundred fifty-seven thousand, eight hundred ninety-six".