9945261693 has 6 divisors (see below), whose sum is σ = 14365378014. Its totient is φ = 6630174456.

The previous prime is 9945261679. The next prime is 9945261701. The reversal of 9945261693 is 3961625499.

9945261693 is a `hidden beast` number, since 99 + 452 + 6 + 16 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8211621924 + 1733639769 = 90618^2 + 41637^2 .

It is not a de Polignac number, because 9945261693 - 2⁵ = 9945261661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945261673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 552514530 + ... + 552514547.

It is an arithmetic number, because the mean of its divisors is an integer number (2394229669).

Almost surely, 2^9945261693 is an apocalyptic number.

It is an amenable number.

9945261693 is a deficient number, since it is larger than the sum of its proper divisors (4420116321).

9945261693 is a wasteful number, since it uses less digits than its factorization.

9945261693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105029083 (or 1105029080 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 9945261693 is about 99725.9329011266. The cubic root of 9945261693 is about 2150.4964920083.

The spelling of 9945261693 in words is "nine billion, nine hundred forty-five million, two hundred sixty-one thousand, six hundred ninety-three".