9912745771 has 8 divisors (see below), whose sum is σ = 9938147904. Its totient is φ = 9887376840.

The previous prime is 9912745763. The next prime is 9912745823. The reversal of 9912745771 is 1775472199.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9912745771 - 2³ = 9912745763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9912740771) 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, 655720 + ... + 670666.

It is an arithmetic number, because the mean of its divisors is an integer number (1242268488).

Almost surely, 2^9912745771 is an apocalyptic number.

9912745771 is a deficient number, since it is larger than the sum of its proper divisors (25402133).

9912745771 is a wasteful number, since it uses less digits than its factorization.

9912745771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16601.

The product of its digits is 1111320, while the sum is 52.

The square root of 9912745771 is about 99562.7730178303. The cubic root of 9912745771 is about 2148.1502584006.

The spelling of 9912745771 in words is "nine billion, nine hundred twelve million, seven hundred forty-five thousand, seven hundred seventy-one".