961779511 has 12 divisors (see below), whose sum is σ = 1208186896. Its totient is φ = 749437920.

The previous prime is 961779493. The next prime is 961779547. The reversal of 961779511 is 115977169.

It is not a de Polignac number, because 961779511 - 2⁷ = 961779383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961779571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 566910 + ... + 568603.

Almost surely, 2^961779511 is an apocalyptic number.

961779511 is a deficient number, since it is larger than the sum of its proper divisors (246407385).

961779511 is a wasteful number, since it uses less digits than its factorization.

961779511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135542 (or 1135531 counting only the distinct ones).

The product of its digits is 119070, while the sum is 46.

The square root of 961779511 is about 31012.5702095134. The cubic root of 961779511 is about 987.0939884292.

The spelling of 961779511 in words is "nine hundred sixty-one million, seven hundred seventy-nine thousand, five hundred eleven".