65816951382 has 128 divisors (see below), whose sum is σ = 180147179520. Its totient is φ = 17345301120.

The previous prime is 65816951357. The next prime is 65816951399. The reversal of 65816951382 is 28315961856.

65816951382 is a `hidden beast` number, since 6 + 58 + 169 + 51 + 382 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7774632 + ... + 7783092.

It is an arithmetic number, because the mean of its divisors is an integer number (1407399840).

Almost surely, 2^65816951382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65816951382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90073589760).

65816951382 is an abundant number, since it is smaller than the sum of its proper divisors (114330228138).

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

65816951382 is a wasteful number, since it uses less digits than its factorization.

65816951382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075 (or 10069 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 65816951382 in words is "sixty-five billion, eight hundred sixteen million, nine hundred fifty-one thousand, three hundred eighty-two".