71641612 has 48 divisors (see below), whose sum is σ = 147938560. Its totient is φ = 29719872.

The previous prime is 71641607. The next prime is 71641613. The reversal of 71641612 is 21614617.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (71641613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188839 + ... + 189217.

Almost surely, 2^71641612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71641612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73969280).

71641612 is an abundant number, since it is smaller than the sum of its proper divisors (76296948).

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

71641612 is a wasteful number, since it uses less digits than its factorization.

71641612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 588 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 71641612 is about 8464.1368136391. The cubic root of 71641612 is about 415.3253595999.

The spelling of 71641612 in words is "seventy-one million, six hundred forty-one thousand, six hundred twelve".