1871469890145 has 40 divisors (see below), whose sum is σ = 3377298493800. Its totient is φ = 991418469120.

The previous prime is 1871469890141. The next prime is 1871469890161. The reversal of 1871469890145 is 5410989641781.

1871469890145 is a `hidden beast` number, since 1 + 8 + 71 + 469 + 8 + 90 + 14 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 48556766736 + 1822913123409 = 220356^2 + 1350153^2 .

It is not a de Polignac number, because 1871469890145 - 2² = 1871469890141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1871469890141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15446076 + ... + 15566765.

It is an arithmetic number, because the mean of its divisors is an integer number (84432462345).

Almost surely, 2^{1871469890145} is an apocalyptic number.

1871469890145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1871469890145 is a deficient number, since it is larger than the sum of its proper divisors (1505828603655).

1871469890145 is a wasteful number, since it uses less digits than its factorization.

1871469890145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31013007 (or 31012998 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 1871469890145 in words is "one trillion, eight hundred seventy-one billion, four hundred sixty-nine million, eight hundred ninety thousand, one hundred forty-five".