961551831513 has 32 divisors (see below), whose sum is σ = 1580531040256. Its totient is φ = 506356515648.

The previous prime is 961551831389. The next prime is 961551831517. The reversal of 961551831513 is 315138155169.

It is not a de Polignac number, because 961551831513 - 2¹⁰ = 961551830489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (961551831517) 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 31 ways as a sum of consecutive naturals, for example, 2735581 + ... + 3067002.

It is an arithmetic number, because the mean of its divisors is an integer number (49391595008).

Almost surely, 2^961551831513 is an apocalyptic number.

It is an amenable number.

961551831513 is a deficient number, since it is larger than the sum of its proper divisors (618979208743).

961551831513 is a wasteful number, since it uses less digits than its factorization.

961551831513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803213.

The product of its digits is 486000, while the sum is 48.

The spelling of 961551831513 in words is "nine hundred sixty-one billion, five hundred fifty-one million, eight hundred thirty-one thousand, five hundred thirteen".