1871887038671 has 16 divisors (see below), whose sum is σ = 2065185242400. Its totient is φ = 1685638356480.

The previous prime is 1871887038661. The next prime is 1871887038733. The reversal of 1871887038671 is 1768307881781.

It is a de Polignac number, because none of the positive numbers 2^k-1871887038671 is a prime.

It is a super-2 number, since 2×1871887038671² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1871887038598 and 1871887038607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1871887038631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8371280 + ... + 8591978.

It is an arithmetic number, because the mean of its divisors is an integer number (129074077650).

Almost surely, 2^{1871887038671} is an apocalyptic number.

1871887038671 is a deficient number, since it is larger than the sum of its proper divisors (193298203729).

1871887038671 is a wasteful number, since it uses less digits than its factorization.

1871887038671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236666.

The product of its (nonzero) digits is 25288704, while the sum is 65.

The spelling of 1871887038671 in words is "one trillion, eight hundred seventy-one billion, eight hundred eighty-seven million, thirty-eight thousand, six hundred seventy-one".