65461491000 has 192 divisors, whose sum is σ = 228398227200. Its totient is φ = 16893216000.

The previous prime is 65461490977. The next prime is 65461491037. The reversal of 65461491000 is 19416456.

65461491000 is a `hidden beast` number, since 6 + 546 + 1 + 4 + 9 + 100 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 161686 + ... + 396314.

It is an arithmetic number, because the mean of its divisors is an integer number (1189574100).

Almost surely, 2^65461491000 is an apocalyptic number.

65461491000 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 65461491000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114199113600).

65461491000 is an abundant number, since it is smaller than the sum of its proper divisors (162936736200).

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

65461491000 is a wasteful number, since it uses less digits than its factorization.

65461491000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234687 (or 234670 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 65461491000 in words is "sixty-five billion, four hundred sixty-one million, four hundred ninety-one thousand".