9791561712 has 40 divisors (see below), whose sum is σ = 25302130560. Its totient is φ = 3262916800.

The previous prime is 9791561693. The next prime is 9791561713. The reversal of 9791561712 is 2171651979.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9791561713) 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, 151087 + ... + 205937.

It is an arithmetic number, because the mean of its divisors is an integer number (632553264).

Almost surely, 2^9791561712 is an apocalyptic number.

It is an amenable number.

9791561712 is an abundant number, since it is smaller than the sum of its proper divisors (15510568848).

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

9791561712 is a wasteful number, since it uses less digits than its factorization.

9791561712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58581 (or 58575 counting only the distinct ones).

The product of its digits is 238140, while the sum is 48.

The square root of 9791561712 is about 98952.3203972499. The cubic root of 9791561712 is about 2139.3605764233.

The spelling of 9791561712 in words is "nine billion, seven hundred ninety-one million, five hundred sixty-one thousand, seven hundred twelve".