1918289431671 has 16 divisors (see below), whose sum is σ = 2603586574080. Its totient is φ = 1256116276800.

The previous prime is 1918289431621. The next prime is 1918289431691. The reversal of 1918289431671 is 1761349828191.

It is not a de Polignac number, because 1918289431671 - 2⁹ = 1918289431159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918289431621) 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, 23749765 + ... + 23830398.

It is an arithmetic number, because the mean of its divisors is an integer number (162724160880).

Almost surely, 2^{1918289431671} is an apocalyptic number.

1918289431671 is a deficient number, since it is larger than the sum of its proper divisors (685297142409).

1918289431671 is a wasteful number, since it uses less digits than its factorization.

1918289431671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47580406.

The product of its digits is 5225472, while the sum is 60.

The spelling of 1918289431671 in words is "one trillion, nine hundred eighteen billion, two hundred eighty-nine million, four hundred thirty-one thousand, six hundred seventy-one".