65786864442 has 64 divisors (see below), whose sum is σ = 148229464320. Its totient is φ = 19313040384.

The previous prime is 65786864441. The next prime is 65786864453. The reversal of 65786864442 is 24446868756.

It is a happy number.

It is a super-2 number, since 2×65786864442² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65786864441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 666034 + ... + 758402.

It is an arithmetic number, because the mean of its divisors is an integer number (2316085380).

Almost surely, 2^65786864442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65786864442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74114732160).

65786864442 is an abundant number, since it is smaller than the sum of its proper divisors (82442599878).

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

65786864442 is a wasteful number, since it uses less digits than its factorization.

65786864442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92807.

The product of its digits is 61931520, while the sum is 60.

The spelling of 65786864442 in words is "sixty-five billion, seven hundred eighty-six million, eight hundred sixty-four thousand, four hundred forty-two".