65767643436 has 96 divisors (see below), whose sum is σ = 177326392320. Its totient is φ = 18749824000.

The previous prime is 65767643413. The next prime is 65767643509. The reversal of 65767643436 is 63434676756.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8301085 + ... + 8309003.

It is an arithmetic number, because the mean of its divisors is an integer number (1847149920).

Almost surely, 2^65767643436 is an apocalyptic number.

65767643436 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65767643436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88663196160).

65767643436 is an abundant number, since it is smaller than the sum of its proper divisors (111558748884).

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

65767643436 is a wasteful number, since it uses less digits than its factorization.

65767643436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11655 (or 11653 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 57.

The spelling of 65767643436 in words is "sixty-five billion, seven hundred sixty-seven million, six hundred forty-three thousand, four hundred thirty-six".