1798639009440 has 1152 divisors, whose sum is σ = 7339650071040. Its totient is φ = 366702723072.

The previous prime is 1798639009429. The next prime is 1798639009457. The reversal of 1798639009440 is 449009368971.

It is a super-2 number, since 2×1798639009440² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1957169301 + ... + 1957170219.

It is an arithmetic number, because the mean of its divisors is an integer number (6371224020).

Almost surely, 2^{1798639009440} is an apocalyptic number.

1798639009440 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 1798639009440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3669825035520).

1798639009440 is an abundant number, since it is smaller than the sum of its proper divisors (5541011061600).

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

1798639009440 is a wasteful number, since it uses less digits than its factorization.

1798639009440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 1798639009440 in words is "one trillion, seven hundred ninety-eight billion, six hundred thirty-nine million, nine thousand, four hundred forty".