1220233553646 has 8 divisors (see below), whose sum is σ = 2440467107304. Its totient is φ = 406744517880.

The previous prime is 1220233553611. The next prime is 1220233553683. The reversal of 1220233553646 is 6463553320221.

It is a sphenic number, since it is the product of 3 distinct primes.

1220233553646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1220233553598 and 1220233553607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101686129465 + ... + 101686129476.

It is an arithmetic number, because the mean of its divisors is an integer number (305058388413).

Almost surely, 2^{1220233553646} is an apocalyptic number.

1220233553646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1220233553646 is a wasteful number, since it uses less digits than its factorization.

1220233553646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203372258946.

The product of its (nonzero) digits is 777600, while the sum is 42.

Adding to 1220233553646 its reverse (6463553320221), we get a palindrome (7683786873867).

The spelling of 1220233553646 in words is "one trillion, two hundred twenty billion, two hundred thirty-three million, five hundred fifty-three thousand, six hundred forty-six".