65859056640 has 528 divisors, whose sum is σ = 253529956800. Its totient is φ = 16205709312.

The previous prime is 65859056639. The next prime is 65859056663. The reversal of 65859056640 is 4665095856.

65859056640 is a `hidden beast` number, since 6 + 5 + 8 + 590 + 5 + 6 + 6 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23361151 + ... + 23363969.

Almost surely, 2^65859056640 is an apocalyptic number.

65859056640 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 65859056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126764978400).

65859056640 is an abundant number, since it is smaller than the sum of its proper divisors (187670900160).

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

65859056640 is a wasteful number, since it uses less digits than its factorization.

65859056640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 65859056640 in words is "sixty-five billion, eight hundred fifty-nine million, fifty-six thousand, six hundred forty".