1819687898880 has 648 divisors, whose sum is σ = 6851702121264. Its totient is φ = 445533388800.

The previous prime is 1819687898869. The next prime is 1819687898881. The reversal of 1819687898880 is 888987869181.

It is a super-2 number, since 2×1819687898880² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1819687898880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819687898881) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 136493815 + ... + 136507145.

Almost surely, 2^{1819687898880} is an apocalyptic number.

1819687898880 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 1819687898880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3425851060632).

1819687898880 is an abundant number, since it is smaller than the sum of its proper divisors (5032014222384).

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

1819687898880 is a wasteful number, since it uses less digits than its factorization.

1819687898880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13433 (or 13399 counting only the distinct ones).

The product of its (nonzero) digits is 891813888, while the sum is 81.

The spelling of 1819687898880 in words is "one trillion, eight hundred nineteen billion, six hundred eighty-seven million, eight hundred ninety-eight thousand, eight hundred eighty".