363891775561 has 8 divisors (see below), whose sum is σ = 373769173440. Its totient is φ = 354016613808.

The previous prime is 363891775549. The next prime is 363891775573. The reversal of 363891775561 is 165577198363.

It is an interprime number because it is at equal distance from previous prime (363891775549) and next prime (363891775573).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-363891775561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 363891775561.

It is not an unprimeable number, because it can be changed into a prime (363898775561) 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 7 ways as a sum of consecutive naturals, for example, 226501 + ... + 882658.

It is an arithmetic number, because the mean of its divisors is an integer number (46721146680).

Almost surely, 2^363891775561 is an apocalyptic number.

It is an amenable number.

363891775561 is a deficient number, since it is larger than the sum of its proper divisors (9877397879).

363891775561 is a wasteful number, since it uses less digits than its factorization.

363891775561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118063.

The product of its digits is 28576800, while the sum is 61.

The spelling of 363891775561 in words is "three hundred sixty-three billion, eight hundred ninety-one million, seven hundred seventy-five thousand, five hundred sixty-one".