9757981266 has 64 divisors (see below), whose sum is σ = 22912212096. Its totient is φ = 2737382400.

The previous prime is 9757981253. The next prime is 9757981273. The reversal of 9757981266 is 6621897579.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2845 + ... + 139728.

It is an arithmetic number, because the mean of its divisors is an integer number (358003314).

Almost surely, 2^9757981266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9757981266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11456106048).

9757981266 is an abundant number, since it is smaller than the sum of its proper divisors (13154230830).

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

9757981266 is a wasteful number, since it uses less digits than its factorization.

9757981266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142667.

The product of its digits is 11430720, while the sum is 60.

The square root of 9757981266 is about 98782.4947346442. The cubic root of 9757981266 is about 2136.9121087926.

The spelling of 9757981266 in words is "nine billion, seven hundred fifty-seven million, nine hundred eighty-one thousand, two hundred sixty-six".