65377987584 has 352 divisors, whose sum is σ = 216770029056. Its totient is φ = 17057710080.

The previous prime is 65377987573. The next prime is 65377987589. The reversal of 65377987584 is 48578977356.

It is not an unprimeable number, because it can be changed into a prime (65377987589) 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, 27115339 + ... + 27117749.

Almost surely, 2^65377987584 is an apocalyptic number.

65377987584 is a gapful number since it is divisible by the number (64) 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 65377987584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108385014528).

65377987584 is an abundant number, since it is smaller than the sum of its proper divisors (151392041472).

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

65377987584 is a wasteful number, since it uses less digits than its factorization.

65377987584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551 (or 2533 counting only the distinct ones).

The product of its digits is 355622400, while the sum is 69.

The spelling of 65377987584 in words is "sixty-five billion, three hundred seventy-seven million, nine hundred eighty-seven thousand, five hundred eighty-four".