1223455567890 has 64 divisors (see below), whose sum is σ = 3090972810240. Its totient is φ = 309069743040.

The previous prime is 1223455567861. The next prime is 1223455567927. The reversal of 1223455567890 is 987655543221.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 1223455567890.

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, 20494185 + ... + 20553795.

It is an arithmetic number, because the mean of its divisors is an integer number (48296450160).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1223455567890 = 2446911135780, but 3⋅1223455567890 = 3670366703670 is not.

Almost surely, 2^{1223455567890} is an apocalyptic number.

1223455567890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223455567890 is an abundant number, since it is smaller than the sum of its proper divisors (1867517242350).

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

1223455567890 is a wasteful number, since it uses less digits than its factorization.

1223455567890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95647.

The product of its (nonzero) digits is 18144000, while the sum is 57.

The spelling of 1223455567890 in words is "one trillion, two hundred twenty-three billion, four hundred fifty-five million, five hundred sixty-seven thousand, eight hundred ninety".