961124551 has 4 divisors (see below), whose sum is σ = 969630192. Its totient is φ = 952618912.

The previous prime is 961124503. The next prime is 961124561. The reversal of 961124551 is 155421169.

It is a happy number.

961124551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155421169 = 4973 ⋅31253.

It is a cyclic number.

It is not a de Polignac number, because 961124551 - 2⁹ = 961124039 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 (961124561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4252651 + ... + 4252876.

It is an arithmetic number, because the mean of its divisors is an integer number (242407548).

Almost surely, 2^961124551 is an apocalyptic number.

961124551 is a deficient number, since it is larger than the sum of its proper divisors (8505641).

961124551 is a wasteful number, since it uses less digits than its factorization.

961124551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8505640.

The product of its digits is 10800, while the sum is 34.

The square root of 961124551 is about 31002.0088220102. The cubic root of 961124551 is about 986.8698712654.

The spelling of 961124551 in words is "nine hundred sixty-one million, one hundred twenty-four thousand, five hundred fifty-one".