84871131878 has 8 divisors (see below), whose sum is σ = 137099520768. Its totient is φ = 39171291624.

The previous prime is 84871131871. The next prime is 84871131911. The reversal of 84871131878 is 87813117848.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84871131871) 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, 1632137126 + ... + 1632137177.

It is an arithmetic number, because the mean of its divisors is an integer number (17137440096).

Almost surely, 2^84871131878 is an apocalyptic number.

84871131878 is a deficient number, since it is larger than the sum of its proper divisors (52228388890).

84871131878 is a wasteful number, since it uses less digits than its factorization.

84871131878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264274318.

The product of its digits is 2408448, while the sum is 56.

The spelling of 84871131878 in words is "eighty-four billion, eight hundred seventy-one million, one hundred thirty-one thousand, eight hundred seventy-eight".