1028557780080 has 160 divisors (see below), whose sum is σ = 3211716246528. Its totient is φ = 272290636800.

The previous prime is 1028557780049. The next prime is 1028557780123. The reversal of 1028557780080 is 800877558201.

It is a super-2 number, since 2×1028557780080² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 44111625 + ... + 44134935.

Almost surely, 2^{1028557780080} is an apocalyptic number.

1028557780080 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 1028557780080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605858123264).

1028557780080 is an abundant number, since it is smaller than the sum of its proper divisors (2183158466448).

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

1028557780080 is a wasteful number, since it uses less digits than its factorization.

1028557780080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24655 (or 24649 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 51.

The spelling of 1028557780080 in words is "one trillion, twenty-eight billion, five hundred fifty-seven million, seven hundred eighty thousand, eighty".