961777949777169 has 32 divisors (see below), whose sum is σ = 1487502196715520. Its totient is φ = 541407048969600.

The previous prime is 961777949777159. The next prime is 961777949777213.

961777949777169 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 961777949777169 - 2⁴ = 961777949777153 is a prime.

It is a super-2 number, since 2×961777949777169² (a number of 31 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (961777949777159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 948930667 + ... + 949943664.

It is an arithmetic number, because the mean of its divisors is an integer number (46484443647360).

Almost surely, 2^{961777949777169} is an apocalyptic number.

It is an amenable number.

961777949777169 is a deficient number, since it is larger than the sum of its proper divisors (525724246938351).

961777949777169 is a wasteful number, since it uses less digits than its factorization.

961777949777169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898874701.

The product of its digits is 111152892816, while the sum is 96.

The spelling of 961777949777169 in words is "nine hundred sixty-one trillion, seven hundred seventy-seven billion, nine hundred forty-nine million, seven hundred seventy-seven thousand, one hundred sixty-nine".