71878255085 has 32 divisors (see below), whose sum is σ = 108325190400. Its totient is φ = 45496551744.

The previous prime is 71878255081. The next prime is 71878255087. The reversal of 71878255085 is 58055287817.

It is not a de Polignac number, because 71878255085 - 2² = 71878255081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71878255085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71878255081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1589687 + ... + 1634276.

It is an arithmetic number, because the mean of its divisors is an integer number (3385162200).

Almost surely, 2^71878255085 is an apocalyptic number.

It is an amenable number.

71878255085 is a deficient number, since it is larger than the sum of its proper divisors (36446935315).

71878255085 is a wasteful number, since it uses less digits than its factorization.

71878255085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224002 (or 3223988 counting only the distinct ones).

The product of its (nonzero) digits is 6272000, while the sum is 56.

The spelling of 71878255085 in words is "seventy-one billion, eight hundred seventy-eight million, two hundred fifty-five thousand, eighty-five".