961598379977 has 2 divisors, whose sum is σ = 961598379978. Its totient is φ = 961598379976.

The previous prime is 961598379971. The next prime is 961598380021. The reversal of 961598379977 is 779973895169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643430183881 + 318168196096 = 802141^2 + 564064^2 .

It is a cyclic number.

It is not a de Polignac number, because 961598379977 - 2¹⁰ = 961598378953 is a prime.

It is not a weakly prime, because it can be changed into another prime (961598379971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480799189988 + 480799189989.

It is an arithmetic number, because the mean of its divisors is an integer number (480799189989).

Almost surely, 2^961598379977 is an apocalyptic number.

It is an amenable number.

961598379977 is a deficient number, since it is larger than the sum of its proper divisors (1).

961598379977 is an equidigital number, since it uses as much as digits as its factorization.

961598379977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620304560, while the sum is 80.

The spelling of 961598379977 in words is "nine hundred sixty-one billion, five hundred ninety-eight million, three hundred seventy-nine thousand, nine hundred seventy-seven".