65021161296 has 640 divisors, whose sum is σ = 227540992000. Its totient is φ = 15519651840.

The previous prime is 65021161241. The next prime is 65021161301. The reversal of 65021161296 is 69216112056.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 326739405 + ... + 326739603.

It is an arithmetic number, because the mean of its divisors is an integer number (355532800).

Almost surely, 2^65021161296 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 65021161296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113770496000).

65021161296 is an abundant number, since it is smaller than the sum of its proper divisors (162519830704).

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

65021161296 is a wasteful number, since it uses less digits than its factorization.

65021161296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 65021161296 in words is "sixty-five billion, twenty-one million, one hundred sixty-one thousand, two hundred ninety-six".