71820067146 has 64 divisors (see below), whose sum is σ = 153268070400. Its totient is φ = 22370414976.

The previous prime is 71820067141. The next prime is 71820067153. The reversal of 71820067146 is 64176002817.

It is a junction number, because it is equal to n+sod(n) for n = 71820067098 and 71820067107.

It is not an unprimeable number, because it can be changed into a prime (71820067141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10470550 + ... + 10477406.

It is an arithmetic number, because the mean of its divisors is an integer number (2394813600).

Almost surely, 2^71820067146 is an apocalyptic number.

71820067146 is an abundant number, since it is smaller than the sum of its proper divisors (81448003254).

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

71820067146 is a wasteful number, since it uses less digits than its factorization.

71820067146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8123.

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 71820067146 in words is "seventy-one billion, eight hundred twenty million, sixty-seven thousand, one hundred forty-six".