1871734802868 has 144 divisors (see below), whose sum is σ = 5582798807040. Its totient is φ = 517424846400.

The previous prime is 1871734802813. The next prime is 1871734802869. The reversal of 1871734802868 is 8682084371781.

1871734802868 is a `hidden beast` number, since 1 + 8 + 7 + 1 + 7 + 348 + 0 + 286 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1871734802869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43186513 + ... + 43229831.

It is an arithmetic number, because the mean of its divisors is an integer number (38769436160).

Almost surely, 2^{1871734802868} is an apocalyptic number.

1871734802868 is a gapful number since it is divisible by the number (18) 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 1871734802868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2791399403520).

1871734802868 is an abundant number, since it is smaller than the sum of its proper divisors (3711064004172).

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

1871734802868 is a wasteful number, since it uses less digits than its factorization.

1871734802868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48898 (or 48893 counting only the distinct ones).

The product of its (nonzero) digits is 28901376, while the sum is 63.

The spelling of 1871734802868 in words is "one trillion, eight hundred seventy-one billion, seven hundred thirty-four million, eight hundred two thousand, eight hundred sixty-eight".