71224881078 has 64 divisors (see below), whose sum is σ = 158784675840. Its totient is φ = 21148003968.

The previous prime is 71224881037. The next prime is 71224881089. The reversal of 71224881078 is 87018842217.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4658875 + ... + 4674137.

It is an arithmetic number, because the mean of its divisors is an integer number (2481010560).

Almost surely, 2^71224881078 is an apocalyptic number.

71224881078 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71224881078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79392337920).

71224881078 is an abundant number, since it is smaller than the sum of its proper divisors (87559794762).

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

71224881078 is a wasteful number, since it uses less digits than its factorization.

71224881078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17373.

The product of its (nonzero) digits is 401408, while the sum is 48.

The spelling of 71224881078 in words is "seventy-one billion, two hundred twenty-four million, eight hundred eighty-one thousand, seventy-eight".