65785287812 has 6 divisors (see below), whose sum is σ = 115124253678. Its totient is φ = 32892643904.

The previous prime is 65785287809. The next prime is 65785287833. The reversal of 65785287812 is 21878258756.

It can be written as a sum of positive squares in only one way, i.e., 43942221376 + 21843066436 = 209624^2 + 147794^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8223160973 + ... + 8223160980.

It is an arithmetic number, because the mean of its divisors is an integer number (19187375613).

Almost surely, 2^65785287812 is an apocalyptic number.

It is an amenable number.

65785287812 is a deficient number, since it is larger than the sum of its proper divisors (49338965866).

65785287812 is a wasteful number, since it uses less digits than its factorization.

65785287812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16446321957 (or 16446321955 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 59.

The spelling of 65785287812 in words is "sixty-five billion, seven hundred eighty-five million, two hundred eighty-seven thousand, eight hundred twelve".