961859121958169 has 16 divisors (see below), whose sum is σ = 972592002083520. Its totient is φ = 951185959260480.

The previous prime is 961859121958129. The next prime is 961859121958183.

961859121958169 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961859121958169 is a prime.

It is a super-2 number, since 2×961859121958169² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 961859121958093 and 961859121958102.

It is not an unprimeable number, because it can be changed into a prime (961859121958129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2403708542 + ... + 2404108664.

It is an arithmetic number, because the mean of its divisors is an integer number (60787000130220).

Almost surely, 2^{961859121958169} is an apocalyptic number.

It is an amenable number.

961859121958169 is a deficient number, since it is larger than the sum of its proper divisors (10732880125351).

961859121958169 is a wasteful number, since it uses less digits than its factorization.

961859121958169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474680.

The product of its digits is 755827200, while the sum is 80.

The spelling of 961859121958169 in words is "nine hundred sixty-one trillion, eight hundred fifty-nine billion, one hundred twenty-one million, nine hundred fifty-eight thousand, one hundred sixty-nine".