65405608050 has 48 divisors (see below), whose sum is σ = 163694076480. Its totient is φ = 17281477440.

The previous prime is 65405608049. The next prime is 65405608057. The reversal of 65405608050 is 5080650456.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (65405608057) 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 23 ways as a sum of consecutive naturals, for example, 1983822 + ... + 2016521.

It is an arithmetic number, because the mean of its divisors is an integer number (3410293260).

Almost surely, 2^65405608050 is an apocalyptic number.

65405608050 is an abundant number, since it is smaller than the sum of its proper divisors (98288468430).

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

65405608050 is a wasteful number, since it uses less digits than its factorization.

65405608050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000467 (or 4000462 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 65405608050 in words is "sixty-five billion, four hundred five million, six hundred eight thousand, fifty".