71018745678 has 20 divisors (see below), whose sum is σ = 159134597160. Its totient is φ = 23672915172.

The previous prime is 71018745643. The next prime is 71018745697. The reversal of 71018745678 is 87654781017.

71018745678 is a `hidden beast` number, since 7 + 1 + 0 + 1 + 8 + 74 + 567 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 219193498 + ... + 219193821.

It is an arithmetic number, because the mean of its divisors is an integer number (7956729858).

Almost surely, 2^71018745678 is an apocalyptic number.

71018745678 is an abundant number, since it is smaller than the sum of its proper divisors (88115851482).

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

71018745678 is a wasteful number, since it uses less digits than its factorization.

71018745678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438387333 (or 438387324 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 54.

The spelling of 71018745678 in words is "seventy-one billion, eighteen million, seven hundred forty-five thousand, six hundred seventy-eight".