1871997335040 has 320 divisors, whose sum is σ = 7136849212416. Its totient is φ = 409281134592.

The previous prime is 1871997335027. The next prime is 1871997335059. The reversal of 1871997335040 is 405337991781.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479494 + ... + 1993466.

Almost surely, 2^{1871997335040} is an apocalyptic number.

1871997335040 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 1871997335040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3568424606208).

1871997335040 is an abundant number, since it is smaller than the sum of its proper divisors (5264851877376).

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

1871997335040 is a wasteful number, since it uses less digits than its factorization.

1871997335040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514029 (or 1514013 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 1871997335040 in words is "one trillion, eight hundred seventy-one billion, nine hundred ninety-seven million, three hundred thirty-five thousand, forty".