65374778450 has 24 divisors (see below), whose sum is σ = 121614083760. Its totient is φ = 26146256400.

The previous prime is 65374778449. The next prime is 65374778459. The reversal of 65374778450 is 5487747356.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65374778459) 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 11 ways as a sum of consecutive naturals, for example, 285305 + ... + 460595.

It is an arithmetic number, because the mean of its divisors is an integer number (5067253490).

Almost surely, 2^65374778450 is an apocalyptic number.

65374778450 is a deficient number, since it is larger than the sum of its proper divisors (56239305310).

65374778450 is a wasteful number, since it uses less digits than its factorization.

65374778450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182762 (or 182757 counting only the distinct ones).

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 65374778450 in words is "sixty-five billion, three hundred seventy-four million, seven hundred seventy-eight thousand, four hundred fifty".