65724979018923 has 144 divisors (see below), whose sum is σ = 114207638688000. Its totient is φ = 36295088860800.

The previous prime is 65724979018883. The next prime is 65724979018981. The reversal of 65724979018923 is 32981097942756.

65724979018923 is a `hidden beast` number, since 6 + 57 + 2 + 497 + 9 + 0 + 1 + 89 + 2 + 3 = 666.

It is not a de Polignac number, because 65724979018923 - 2⁸ = 65724979018667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65724979016923) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 675432373 + ... + 675529673.

It is an arithmetic number, because the mean of its divisors is an integer number (793108602000).

It is a 1-persistent number, because it is pandigital, but 2⋅65724979018923 = 131449958037846 is not.

Almost surely, 2^{65724979018923} is an apocalyptic number.

65724979018923 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

65724979018923 is a deficient number, since it is larger than the sum of its proper divisors (48482659669077).

65724979018923 is a wasteful number, since it uses less digits than its factorization.

65724979018923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97742 (or 97732 counting only the distinct ones).

The product of its (nonzero) digits is 411505920, while the sum is 72.

The spelling of 65724979018923 in words is "sixty-five trillion, seven hundred twenty-four billion, nine hundred seventy-nine million, eighteen thousand, nine hundred twenty-three".