961395563 has 8 divisors (see below), whose sum is σ = 978593616. Its totient is φ = 944244000.

The previous prime is 961395541. The next prime is 961395571. The reversal of 961395563 is 365593169.

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

It is a cyclic number.

It is not a de Polignac number, because 961395563 - 2¹⁸ = 961133419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961395583) 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, 31520 + ... + 54002.

It is an arithmetic number, because the mean of its divisors is an integer number (122324202).

Almost surely, 2^961395563 is an apocalyptic number.

961395563 is a deficient number, since it is larger than the sum of its proper divisors (17198053).

961395563 is a wasteful number, since it uses less digits than its factorization.

961395563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23245.

The product of its digits is 656100, while the sum is 47.

The square root of 961395563 is about 31006.3793919896. The cubic root of 961395563 is about 986.9626197175.

The spelling of 961395563 in words is "nine hundred sixty-one million, three hundred ninety-five thousand, five hundred sixty-three".