961445061391 has 4 divisors (see below), whose sum is σ = 994598339400. Its totient is φ = 928291783384.

The previous prime is 961445061371. The next prime is 961445061403. The reversal of 961445061391 is 193160544169.

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

It is a de Polignac number, because none of the positive numbers 2^k-961445061391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961445061361) 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, 16576638961 + ... + 16576639018.

It is an arithmetic number, because the mean of its divisors is an integer number (248649584850).

Almost surely, 2^961445061391 is an apocalyptic number.

961445061391 is a deficient number, since it is larger than the sum of its proper divisors (33153278009).

961445061391 is a wasteful number, since it uses less digits than its factorization.

961445061391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33153278008.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 961445061391 in words is "nine hundred sixty-one billion, four hundred forty-five million, sixty-one thousand, three hundred ninety-one".