961151885 has 4 divisors (see below), whose sum is σ = 1153382268. Its totient is φ = 768921504.

The previous prime is 961151857. The next prime is 961151887. The reversal of 961151885 is 588151169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588151169 = 521 ⋅1128889.

It can be written as a sum of positive squares in 2 ways, for example, as 761042569 + 200109316 = 27587^2 + 14146^2 .

It is a cyclic number.

It is not a de Polignac number, because 961151885 - 2⁸ = 961151629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961151887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96115184 + ... + 96115193.

It is an arithmetic number, because the mean of its divisors is an integer number (288345567).

Almost surely, 2^961151885 is an apocalyptic number.

It is an amenable number.

961151885 is a deficient number, since it is larger than the sum of its proper divisors (192230383).

961151885 is a wasteful number, since it uses less digits than its factorization.

961151885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192230382.

The product of its digits is 86400, while the sum is 44.

The square root of 961151885 is about 31002.4496612768. The cubic root of 961151885 is about 986.8792265722.

The spelling of 961151885 in words is "nine hundred sixty-one million, one hundred fifty-one thousand, eight hundred eighty-five".