71217538078 has 16 divisors (see below), whose sum is σ = 110280854016. Its totient is φ = 34457431320.

The previous prime is 71217538069. The next prime is 71217538087. The reversal of 71217538078 is 87083571217.

It is an interprime number because it is at equal distance from previous prime (71217538069) and next prime (71217538087).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935725 + ... + 1008967.

It is an arithmetic number, because the mean of its divisors is an integer number (6892553376).

Almost surely, 2^71217538078 is an apocalyptic number.

71217538078 is a deficient number, since it is larger than the sum of its proper divisors (39063315938).

71217538078 is a wasteful number, since it uses less digits than its factorization.

71217538078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88959.

The product of its (nonzero) digits is 658560, while the sum is 49.

The spelling of 71217538078 in words is "seventy-one billion, two hundred seventeen million, five hundred thirty-eight thousand, seventy-eight".