71187100012 has 48 divisors (see below), whose sum is σ = 149788634688. Its totient is φ = 28960174080.

The previous prime is 71187099961. The next prime is 71187100021. The reversal of 71187100012 is 21000178117.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795493 + ... + 880444.

It is an arithmetic number, because the mean of its divisors is an integer number (3120596556).

Almost surely, 2^71187100012 is an apocalyptic number.

It is an amenable number.

71187100012 is an abundant number, since it is smaller than the sum of its proper divisors (78601534676).

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

71187100012 is a wasteful number, since it uses less digits than its factorization.

71187100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676026 (or 1676024 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 28.

Adding to 71187100012 its reverse (21000178117), we get a palindrome (92187278129).

The spelling of 71187100012 in words is "seventy-one billion, one hundred eighty-seven million, one hundred thousand, twelve".