961791391357 has 4 divisors (see below), whose sum is σ = 965815623360. Its totient is φ = 957767159356.

The previous prime is 961791391313. The next prime is 961791391361. The reversal of 961791391357 is 753193197169.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 961791391357 - 2³¹ = 959643907709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 961791391295 and 961791391304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961791331357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012115643 + ... + 2012116120.

It is an arithmetic number, because the mean of its divisors is an integer number (241453905840).

Almost surely, 2^961791391357 is an apocalyptic number.

It is an amenable number.

961791391357 is a deficient number, since it is larger than the sum of its proper divisors (4024232003).

961791391357 is a wasteful number, since it uses less digits than its factorization.

961791391357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024232002.

The product of its digits is 9644670, while the sum is 61.

The spelling of 961791391357 in words is "nine hundred sixty-one billion, seven hundred ninety-one million, three hundred ninety-one thousand, three hundred fifty-seven".