9791225961 has 32 divisors (see below), whose sum is σ = 14679346176. Its totient is φ = 5754504000.

The previous prime is 9791225903. The next prime is 9791225963. The reversal of 9791225961 is 1695221979.

It is not a de Polignac number, because 9791225961 - 2²¹ = 9789128809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9791225963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108670 + ... + 177176.

It is an arithmetic number, because the mean of its divisors is an integer number (458729568).

Almost surely, 2^9791225961 is an apocalyptic number.

It is an amenable number.

9791225961 is a deficient number, since it is larger than the sum of its proper divisors (4888120215).

9791225961 is a wasteful number, since it uses less digits than its factorization.

9791225961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68653.

The product of its digits is 612360, while the sum is 51.

The square root of 9791225961 is about 98950.6238535160. The cubic root of 9791225961 is about 2139.3361233726.

The spelling of 9791225961 in words is "nine billion, seven hundred ninety-one million, two hundred twenty-five thousand, nine hundred sixty-one".