65500020057 has 16 divisors (see below), whose sum is σ = 91136435328. Its totient is φ = 41765391360.

The previous prime is 65500020037. The next prime is 65500020059. The reversal of 65500020057 is 75002000556.

It is not a de Polignac number, because 65500020057 - 2⁶ = 65500019993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65500020059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1832953 + ... + 1868345.

It is an arithmetic number, because the mean of its divisors is an integer number (5696027208).

Almost surely, 2^65500020057 is an apocalyptic number.

It is an amenable number.

65500020057 is a deficient number, since it is larger than the sum of its proper divisors (25636415271).

65500020057 is a wasteful number, since it uses less digits than its factorization.

65500020057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62240.

The product of its (nonzero) digits is 10500, while the sum is 30.

The spelling of 65500020057 in words is "sixty-five billion, five hundred million, twenty thousand, fifty-seven".