1225537546688 has 224 divisors, whose sum is σ = 3113338195968. Its totient is φ = 465597849600.

The previous prime is 1225537546637. The next prime is 1225537546693. The reversal of 1225537546688 is 8866457355221.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 1225537546688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23625356 + ... + 23677172.

It is an arithmetic number, because the mean of its divisors is an integer number (13898831232).

Almost surely, 2^{1225537546688} 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 1225537546688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1556669097984).

1225537546688 is an abundant number, since it is smaller than the sum of its proper divisors (1887800649280).

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

1225537546688 is a wasteful number, since it uses less digits than its factorization.

1225537546688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52011 (or 52001 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 62.

The spelling of 1225537546688 in words is "one trillion, two hundred twenty-five billion, five hundred thirty-seven million, five hundred forty-six thousand, six hundred eighty-eight".