961646426593 has 4 divisors (see below), whose sum is σ = 962768535300. Its totient is φ = 960524317888.

The previous prime is 961646426579. The next prime is 961646426597. The reversal of 961646426593 is 395624646169.

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 843260197264 + 118386229329 = 918292^2 + 344073^2 .

It is a cyclic number.

It is not a de Polignac number, because 961646426593 - 2²⁵ = 961612872161 is a prime.

It is a super-2 number, since 2×961646426593² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961646426597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561053068 + ... + 561054781.

It is an arithmetic number, because the mean of its divisors is an integer number (240692133825).

Almost surely, 2^961646426593 is an apocalyptic number.

It is an amenable number.

961646426593 is a deficient number, since it is larger than the sum of its proper divisors (1122108707).

961646426593 is a wasteful number, since it uses less digits than its factorization.

961646426593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122108706.

The product of its digits is 50388480, while the sum is 61.

The spelling of 961646426593 in words is "nine hundred sixty-one billion, six hundred forty-six million, four hundred twenty-six thousand, five hundred ninety-three".