1234557855000 has 560 divisors, whose sum is σ = 4351786888680. Its totient is φ = 328084992000.

The previous prime is 1234557854989. The next prime is 1234557855001. The reversal of 1234557855000 is 5587554321.

1234557855000 is a `hidden beast` number, since 1 + 2 + 3 + 45 + 57 + 8 + 550 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234557855001) by changing a digit.

It is a polite number, since it can be written in 139 ways as a sum of consecutive naturals, for example, 2103164707 + ... + 2103165293.

Almost surely, 2^{1234557855000} is an apocalyptic number.

1234557855000 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 1234557855000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2175893444340).

1234557855000 is an abundant number, since it is smaller than the sum of its proper divisors (3117229033680).

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

1234557855000 is an frugal number, since it uses more digits than its factorization.

1234557855000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The spelling of 1234557855000 in words is "one trillion, two hundred thirty-four billion, five hundred fifty-seven million, eight hundred fifty-five thousand".