1220696386560 has 1232 divisors, whose sum is σ = 5283775353600. Its totient is φ = 264223752192.

The previous prime is 1220696386543. The next prime is 1220696386561. The reversal of 1220696386560 is 656836960221.

1220696386560 is a `hidden beast` number, since 1 + 2 + 206 + 9 + 6 + 386 + 56 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1220696386497 and 1220696386506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220696386561) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 496418611 + ... + 496421069.

Almost surely, 2^{1220696386560} is an apocalyptic number.

1220696386560 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 1220696386560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2641887676800).

1220696386560 is an abundant number, since it is smaller than the sum of its proper divisors (4063078967040).

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

1220696386560 is an equidigital number, since it uses as much as digits as its factorization.

1220696386560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 1220696386560 in words is "one trillion, two hundred twenty billion, six hundred ninety-six million, three hundred eighty-six thousand, five hundred sixty".