65490180000 has 480 divisors, whose sum is σ = 247006932480. Its totient is φ = 14878080000.

The previous prime is 65490179987. The next prime is 65490180029. The reversal of 65490180000 is 8109456.

It is a tau number, because it is divible by the number of its divisors (480).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 88619631 + ... + 88620369.

It is an arithmetic number, because the mean of its divisors is an integer number (514597776).

Almost surely, 2^65490180000 is an apocalyptic number.

65490180000 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 65490180000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123503466240).

65490180000 is an abundant number, since it is smaller than the sum of its proper divisors (181516752480).

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

65490180000 is a wasteful number, since it uses less digits than its factorization.

65490180000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 65490180000 its reverse (8109456), we get a palindrome (65498289456).

The spelling of 65490180000 in words is "sixty-five billion, four hundred ninety million, one hundred eighty thousand".