9561256133 has 16 divisors (see below), whose sum is σ = 11824008000. Its totient is φ = 7601143680.

The previous prime is 9561256079. The next prime is 9561256141. The reversal of 9561256133 is 3316521659.

It is not a de Polignac number, because 9561256133 - 2²⁴ = 9544478917 is a prime.

It is a super-2 number, since 2×9561256133² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9561256163) 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, 1756808 + ... + 1762241.

It is an arithmetic number, because the mean of its divisors is an integer number (739000500).

Almost surely, 2^9561256133 is an apocalyptic number.

It is an amenable number.

9561256133 is a deficient number, since it is larger than the sum of its proper divisors (2262751867).

9561256133 is a wasteful number, since it uses less digits than its factorization.

9561256133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519092.

The product of its digits is 145800, while the sum is 41.

The square root of 9561256133 is about 97781.6758549372. The cubic root of 9561256133 is about 2122.4541513022.

The spelling of 9561256133 in words is "nine billion, five hundred sixty-one million, two hundred fifty-six thousand, one hundred thirty-three".