65194709376 has 128 divisors (see below), whose sum is σ = 177380121600. Its totient is φ = 21204707328.

The previous prime is 65194709311. The next prime is 65194709381. The reversal of 65194709376 is 67390749156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×65194709376² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29538865 + ... + 29541071.

It is an arithmetic number, because the mean of its divisors is an integer number (1385782200).

Almost surely, 2^65194709376 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 65194709376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88690060800).

65194709376 is an abundant number, since it is smaller than the sum of its proper divisors (112185412224).

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

65194709376 is a wasteful number, since it uses less digits than its factorization.

65194709376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056 (or 4044 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 57.

The spelling of 65194709376 in words is "sixty-five billion, one hundred ninety-four million, seven hundred nine thousand, three hundred seventy-six".