1223162655400 has 192 divisors, whose sum is σ = 3364439126400. Its totient is φ = 404638295040.

The previous prime is 1223162655383. The next prime is 1223162655409. The reversal of 1223162655400 is 45562613221.

It is a super-2 number, since 2×1223162655400² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223162655400.

It is not an unprimeable number, because it can be changed into a prime (1223162655409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66046942 + ... + 66065458.

It is an arithmetic number, because the mean of its divisors is an integer number (17523120450).

Almost surely, 2^{1223162655400} is an apocalyptic number.

1223162655400 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 1223162655400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1682219563200).

1223162655400 is an abundant number, since it is smaller than the sum of its proper divisors (2141276471000).

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

1223162655400 is a wasteful number, since it uses less digits than its factorization.

1223162655400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20196 (or 20187 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 1223162655400 in words is "one trillion, two hundred twenty-three billion, one hundred sixty-two million, six hundred fifty-five thousand, four hundred".