1228873501056 has 128 divisors (see below), whose sum is σ = 3384100218240. Its totient is φ = 394818375680.

The previous prime is 1228873501039. The next prime is 1228873501057. The reversal of 1228873501056 is 6501053788221.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1228873500996 and 1228873501014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228873501057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836551 + ... + 1776953.

It is an arithmetic number, because the mean of its divisors is an integer number (26438282955).

Almost surely, 2^{1228873501056} is an apocalyptic number.

1228873501056 is a gapful number since it is divisible by the number (16) 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 1228873501056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1692050109120).

1228873501056 is an abundant number, since it is smaller than the sum of its proper divisors (2155226717184).

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

1228873501056 is an equidigital number, since it uses as much as digits as its factorization.

1228873501056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940544 (or 940532 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 1228873501056 in words is "one trillion, two hundred twenty-eight billion, eight hundred seventy-three million, five hundred one thousand, fifty-six".