71031421188 has 288 divisors, whose sum is σ = 238036198400. Its totient is φ = 17334196992.

The previous prime is 71031421091. The next prime is 71031421229. The reversal of 71031421188 is 88112413017.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2663223 + ... + 2689761.

Almost surely, 2^71031421188 is an apocalyptic number.

71031421188 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71031421188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119018099200).

71031421188 is an abundant number, since it is smaller than the sum of its proper divisors (167004777212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71031421188 is a wasteful number, since it uses less digits than its factorization.

71031421188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26631 (or 26626 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 71031421188 in words is "seventy-one billion, thirty-one million, four hundred twenty-one thousand, one hundred eighty-eight".