1918319543910 has 768 divisors, whose sum is σ = 6666308812800. Its totient is φ = 370993996800.

The previous prime is 1918319543893. The next prime is 1918319543951. The reversal of 1918319543910 is 193459138191.

1918319543910 is a `hidden beast` number, since 1 + 9 + 1 + 8 + 3 + 1 + 9 + 543 + 91 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 2286435271 + ... + 2286436109.

It is an arithmetic number, because the mean of its divisors is an integer number (8680089600).

Almost surely, 2^{1918319543910} is an apocalyptic number.

1918319543910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1918319543910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3333154406400).

1918319543910 is an abundant number, since it is smaller than the sum of its proper divisors (4747989268890).

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

1918319543910 is a wasteful number, since it uses less digits than its factorization.

1918319543910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The spelling of 1918319543910 in words is "one trillion, nine hundred eighteen billion, three hundred nineteen million, five hundred forty-three thousand, nine hundred ten".