1022155444552 has 128 divisors (see below), whose sum is σ = 2292514876800. Its totient is φ = 421999718400.

The previous prime is 1022155444549. The next prime is 1022155444573. The reversal of 1022155444552 is 2554445512201.

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, 4730899 + ... + 4942237.

It is an arithmetic number, because the mean of its divisors is an integer number (17910272475).

Almost surely, 2^{1022155444552} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022155444552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146257438400).

1022155444552 is an abundant number, since it is smaller than the sum of its proper divisors (1270359432248).

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

1022155444552 is a wasteful number, since it uses less digits than its factorization.

1022155444552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211487 (or 211483 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 40.

The spelling of 1022155444552 in words is "one trillion, twenty-two billion, one hundred fifty-five million, four hundred forty-four thousand, five hundred fifty-two".