65490687899 has 24 divisors (see below), whose sum is σ = 85610397600. Its totient is φ = 49563892224.

The previous prime is 65490687883. The next prime is 65490687917. The reversal of 65490687899 is 99878609456.

It is not a de Polignac number, because 65490687899 - 2⁴ = 65490687883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65490687839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2220374 + ... + 2249675.

It is an arithmetic number, because the mean of its divisors is an integer number (3567099900).

Almost surely, 2^65490687899 is an apocalyptic number.

65490687899 is a deficient number, since it is larger than the sum of its proper divisors (20119709701).

65490687899 is a wasteful number, since it uses less digits than its factorization.

65490687899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470099 (or 4470092 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 71.

The spelling of 65490687899 in words is "sixty-five billion, four hundred ninety million, six hundred eighty-seven thousand, eight hundred ninety-nine".