71219920015218 has 64 divisors (see below), whose sum is σ = 157640532577920. Its totient is φ = 21308303273472.

The previous prime is 71219920015093. The next prime is 71219920015229. The reversal of 71219920015218 is 81251002991217.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3025080 + ... + 12312227.

It is an arithmetic number, because the mean of its divisors is an integer number (2463133321530).

Almost surely, 2^{71219920015218} is an apocalyptic number.

71219920015218 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

71219920015218 is an abundant number, since it is smaller than the sum of its proper divisors (86420612562702).

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

71219920015218 is a wasteful number, since it uses less digits than its factorization.

71219920015218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15338971.

The product of its (nonzero) digits is 181440, while the sum is 48.

The spelling of 71219920015218 in words is "seventy-one trillion, two hundred nineteen billion, nine hundred twenty million, fifteen thousand, two hundred eighteen".