368535972781 has 4 divisors (see below), whose sum is σ = 369143116672. Its totient is φ = 367928828892.

The previous prime is 368535972719. The next prime is 368535972809. The reversal of 368535972781 is 187279535863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 368535972781 - 2⁷ = 368535972653 is a prime.

It is a super-2 number, since 2×368535972781² (a number of 24 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 (368535972281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303571035 + ... + 303572248.

It is an arithmetic number, because the mean of its divisors is an integer number (92285779168).

Almost surely, 2^368535972781 is an apocalyptic number.

It is an amenable number.

368535972781 is a deficient number, since it is larger than the sum of its proper divisors (607143891).

368535972781 is an equidigital number, since it uses as much as digits as its factorization.

368535972781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607143890.

The product of its digits is 76204800, while the sum is 64.

The spelling of 368535972781 in words is "three hundred sixty-eight billion, five hundred thirty-five million, nine hundred seventy-two thousand, seven hundred eighty-one".