365950249561 has 4 divisors (see below), whose sum is σ = 394100268772. Its totient is φ = 337800230352.

The previous prime is 365950249537. The next prime is 365950249571. The reversal of 365950249561 is 165942059563.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62828430336 + 303121819225 = 250656^2 + 550565^2 .

It is a de Polignac number, because none of the positive numbers 2^k-365950249561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (365950249501) 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 3 ways as a sum of consecutive naturals, for example, 14075009586 + ... + 14075009611.

It is an arithmetic number, because the mean of its divisors is an integer number (98525067193).

Almost surely, 2^365950249561 is an apocalyptic number.

It is an amenable number.

365950249561 is a deficient number, since it is larger than the sum of its proper divisors (28150019211).

365950249561 is a wasteful number, since it uses less digits than its factorization.

365950249561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28150019210.

The product of its (nonzero) digits is 8748000, while the sum is 55.

The spelling of 365950249561 in words is "three hundred sixty-five billion, nine hundred fifty million, two hundred forty-nine thousand, five hundred sixty-one".