65450240019 has 12 divisors (see below), whose sum is σ = 94544100456. Its totient is φ = 43631248032.

The previous prime is 65450239991. The next prime is 65450240083. The reversal of 65450240019 is 91004205456.

65450240019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65450240019 - 2¹⁹ = 65449715731 is a prime.

It is a super-2 number, since 2×65450240019² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65450240419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8239 + ... + 361895.

It is an arithmetic number, because the mean of its divisors is an integer number (7878675038).

Almost surely, 2^65450240019 is an apocalyptic number.

65450240019 is a deficient number, since it is larger than the sum of its proper divisors (29093860437).

65450240019 is a wasteful number, since it uses less digits than its factorization.

65450240019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374226 (or 374223 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 65450240019 in words is "sixty-five billion, four hundred fifty million, two hundred forty thousand, nineteen".