65609950560 has 384 divisors, whose sum is σ = 261901237248. Its totient is φ = 13409280000.

The previous prime is 65609950541. The next prime is 65609950561. The reversal of 65609950560 is 6505990656.

It is a super-2 number, since 2×65609950560² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65609950561) 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, 2240010 + ... + 2269110.

It is an arithmetic number, because the mean of its divisors is an integer number (682034472).

Almost surely, 2^65609950560 is an apocalyptic number.

65609950560 is a gapful number since it is divisible by the number (60) 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 65609950560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130950618624).

65609950560 is an abundant number, since it is smaller than the sum of its proper divisors (196291286688).

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

65609950560 is a wasteful number, since it uses less digits than its factorization.

65609950560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29198 (or 29190 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 51.

The spelling of 65609950560 in words is "sixty-five billion, six hundred nine million, nine hundred fifty thousand, five hundred sixty".