65894288249856 has 88 divisors (see below), whose sum is σ = 191598875165664. Its totient is φ = 19967966126080.

The previous prime is 65894288249833. The next prime is 65894288249863.

65894288249856 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (88).

It is a super-2 number, since 2×65894288249856² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974964555 + ... + 975032138.

Almost surely, 2^{65894288249856} is an apocalyptic number.

65894288249856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

65894288249856 is an abundant number, since it is smaller than the sum of its proper divisors (125704586915808).

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

65894288249856 is a wasteful number, since it uses less digits than its factorization.

65894288249856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949996727 (or 1949996709 counting only the distinct ones).

The product of its digits is 19110297600, while the sum is 84.

The spelling of 65894288249856 in words is "sixty-five trillion, eight hundred ninety-four billion, two hundred eighty-eight million, two hundred forty-nine thousand, eight hundred fifty-six".