65771071492 has 72 divisors (see below), whose sum is σ = 138310272576. Its totient is φ = 26805159744.

The previous prime is 65771071433. The next prime is 65771071501. The reversal of 65771071492 is 29417017756.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2549643 + ... + 2575309.

It is an arithmetic number, because the mean of its divisors is an integer number (1920976008).

Almost surely, 2^65771071492 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 65771071492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69155136288).

65771071492 is an abundant number, since it is smaller than the sum of its proper divisors (72539201084).

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

65771071492 is a wasteful number, since it uses less digits than its factorization.

65771071492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25897 (or 25872 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 65771071492 in words is "sixty-five billion, seven hundred seventy-one million, seventy-one thousand, four hundred ninety-two".