1222961725440 has 2176 divisors, whose sum is σ = 5637101568000. Its totient is φ = 249707888640.

The previous prime is 1222961725439. The next prime is 1222961725441. The reversal of 1222961725440 is 445271692221.

1222961725440 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 9 + 617 + 25 + 4 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1222961725439) and next prime (1222961725441).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222961725441) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 39450378225 + ... + 39450378255.

Almost surely, 2^{1222961725440} is an apocalyptic number.

1222961725440 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 1222961725440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2818550784000).

1222961725440 is an abundant number, since it is smaller than the sum of its proper divisors (4414139842560).

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

1222961725440 is an frugal number, since it uses more digits than its factorization.

1222961725440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 1222961725440 in words is "one trillion, two hundred twenty-two billion, nine hundred sixty-one million, seven hundred twenty-five thousand, four hundred forty".