961378923853 has 2 divisors, whose sum is σ = 961378923854. Its totient is φ = 961378923852.

The previous prime is 961378923811. The next prime is 961378923877. The reversal of 961378923853 is 358329873169.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 940770024489 + 20608899364 = 969933^2 + 143558^2 .

It is a cyclic number.

It is not a de Polignac number, because 961378923853 - 2²⁹ = 960842052941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961378993853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480689461926 + 480689461927.

It is an arithmetic number, because the mean of its divisors is an integer number (480689461927).

Almost surely, 2^961378923853 is an apocalyptic number.

It is an amenable number.

961378923853 is a deficient number, since it is larger than the sum of its proper divisors (1).

961378923853 is an equidigital number, since it uses as much as digits as its factorization.

961378923853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 64.

The spelling of 961378923853 in words is "nine hundred sixty-one billion, three hundred seventy-eight million, nine hundred twenty-three thousand, eight hundred fifty-three".