9771248312 has 32 divisors (see below), whose sum is σ = 21123698400. Its totient is φ = 4150616064.

The previous prime is 9771248303. The next prime is 9771248317. The reversal of 9771248312 is 2138421779.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9771248317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765737 + ... + 778392.

It is an arithmetic number, because the mean of its divisors is an integer number (660115575).

Almost surely, 2^9771248312 is an apocalyptic number.

It is an amenable number.

9771248312 is an abundant number, since it is smaller than the sum of its proper divisors (11352450088).

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

9771248312 is a wasteful number, since it uses less digits than its factorization.

9771248312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544255 (or 1544251 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 9771248312 is about 98849.6247438502. The cubic root of 9771248312 is about 2137.8801256951.

The spelling of 9771248312 in words is "nine billion, seven hundred seventy-one million, two hundred forty-eight thousand, three hundred twelve".