65219793381 has 16 divisors (see below), whose sum is σ = 96664590400. Its totient is φ = 43460658864.

The previous prime is 65219793323. The next prime is 65219793421. The reversal of 65219793381 is 18339791256.

65219793381 is a `hidden beast` number, since 6 + 521 + 9 + 7 + 9 + 33 + 81 = 666.

It is not a de Polignac number, because 65219793381 - 2¹¹ = 65219791333 is a prime.

It is a super-2 number, since 2×65219793381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65219797381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471031 + ... + 593556.

It is an arithmetic number, because the mean of its divisors is an integer number (6041536900).

Almost surely, 2^65219793381 is an apocalyptic number.

It is an amenable number.

65219793381 is a deficient number, since it is larger than the sum of its proper divisors (31444797019).

65219793381 is a wasteful number, since it uses less digits than its factorization.

65219793381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066865 (or 1066859 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The spelling of 65219793381 in words is "sixty-five billion, two hundred nineteen million, seven hundred ninety-three thousand, three hundred eighty-one".