961162591391 has 2 divisors, whose sum is σ = 961162591392. Its totient is φ = 961162591390.

The previous prime is 961162591369. The next prime is 961162591423. The reversal of 961162591391 is 193195261169.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961162591391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961162591891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480581295695 + 480581295696.

It is an arithmetic number, because the mean of its divisors is an integer number (480581295696).

Almost surely, 2^961162591391 is an apocalyptic number.

961162591391 is a deficient number, since it is larger than the sum of its proper divisors (1).

961162591391 is an equidigital number, since it uses as much as digits as its factorization.

961162591391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 53.

The spelling of 961162591391 in words is "nine hundred sixty-one billion, one hundred sixty-two million, five hundred ninety-one thousand, three hundred ninety-one".