7918975871 has 4 divisors (see below), whose sum is σ = 7964750472. Its totient is φ = 7873201272.

The previous prime is 7918975849. The next prime is 7918975927. The reversal of 7918975871 is 1785798197.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1785798197 = 73 ⋅24462989.

It is a cyclic number.

It is not a de Polignac number, because 7918975871 - 2¹⁸ = 7918713727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7918975271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22887041 + ... + 22887386.

It is an arithmetic number, because the mean of its divisors is an integer number (1991187618).

Almost surely, 2^7918975871 is an apocalyptic number.

7918975871 is a deficient number, since it is larger than the sum of its proper divisors (45774601).

7918975871 is a wasteful number, since it uses less digits than its factorization.

7918975871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45774600.

The product of its digits is 8890560, while the sum is 62.

The square root of 7918975871 is about 88988.6277622034. The cubic root of 7918975871 is about 1993.2250652938.

The spelling of 7918975871 in words is "seven billion, nine hundred eighteen million, nine hundred seventy-five thousand, eight hundred seventy-one".