9951879522 has 64 divisors (see below), whose sum is σ = 22397679360. Its totient is φ = 2924934144.

The previous prime is 9951879521. The next prime is 9951879557. The reversal of 9951879522 is 2259781599.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9951879521) 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, 1447918 + ... + 1454774.

It is an arithmetic number, because the mean of its divisors is an integer number (349963740).

Almost surely, 2^9951879522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9951879522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11198839680).

9951879522 is an abundant number, since it is smaller than the sum of its proper divisors (12445799838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9951879522 is a wasteful number, since it uses less digits than its factorization.

9951879522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7707.

The product of its digits is 4082400, while the sum is 57.

The square root of 9951879522 is about 99759.1074639303. The cubic root of 9951879522 is about 2150.9733845212.

The spelling of 9951879522 in words is "nine billion, nine hundred fifty-one million, eight hundred seventy-nine thousand, five hundred twenty-two".