65737561344 has 576 divisors, whose sum is σ = 222298245120. Its totient is φ = 16787865600.

The previous prime is 65737561327. The next prime is 65737561349. The reversal of 65737561344 is 44316573756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65737561349) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 472932027 + ... + 472932165.

Almost surely, 2^65737561344 is an apocalyptic number.

65737561344 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 65737561344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111149122560).

65737561344 is an abundant number, since it is smaller than the sum of its proper divisors (156560683776).

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

65737561344 is a wasteful number, since it uses less digits than its factorization.

65737561344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 332 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 51.

The spelling of 65737561344 in words is "sixty-five billion, seven hundred thirty-seven million, five hundred sixty-one thousand, three hundred forty-four".