65490593616 has 120 divisors (see below), whose sum is σ = 210405977600. Its totient is φ = 18627625728.

The previous prime is 65490593579. The next prime is 65490593621. The reversal of 65490593616 is 61639509456.

65490593616 is a `hidden beast` number, since 6 + 5 + 49 + 0 + 593 + 6 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79110 + ... + 370458.

Almost surely, 2^65490593616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65490593616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105202988800).

65490593616 is an abundant number, since it is smaller than the sum of its proper divisors (144915383984).

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

65490593616 is a wasteful number, since it uses less digits than its factorization.

65490593616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291593 (or 291584 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 65490593616 in words is "sixty-five billion, four hundred ninety million, five hundred ninety-three thousand, six hundred sixteen".