871418606641672 has 64 divisors (see below), whose sum is σ = 1661599928142000. Its totient is φ = 428333133680640.

The previous prime is 871418606641619. The next prime is 871418606641679. The reversal of 871418606641672 is 276146606814178.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 18409128223396 + 853009478418276 = 4290586^2 + 29206326^2 .

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 871418606641598 and 871418606641607.

It is not an unprimeable number, because it can be changed into a prime (871418606641679) 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, 7543842988 + ... + 7543958500.

Almost surely, 2^{871418606641672} is an apocalyptic number.

It is an amenable number.

871418606641672 is a deficient number, since it is larger than the sum of its proper divisors (790181321500328).

871418606641672 is a wasteful number, since it uses less digits than its factorization.

871418606641672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123866 (or 123862 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 67.

It can be divided in two parts, 871418606 and 641672, that added together give a palindrome (872060278).

The spelling of 871418606641672 in words is "eight hundred seventy-one trillion, four hundred eighteen billion, six hundred six million, six hundred forty-one thousand, six hundred seventy-two".