9517820061 has 4 divisors (see below), whose sum is σ = 12690426752. Its totient is φ = 6345213372.

The previous prime is 9517820051. The next prime is 9517820069. The reversal of 9517820061 is 1600287159.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9517820061 - 2¹⁴ = 9517803677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9517820069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586303341 + ... + 1586303346.

It is an arithmetic number, because the mean of its divisors is an integer number (3172606688).

Almost surely, 2^9517820061 is an apocalyptic number.

It is an amenable number.

9517820061 is a deficient number, since it is larger than the sum of its proper divisors (3172606691).

9517820061 is a wasteful number, since it uses less digits than its factorization.

9517820061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172606690.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 9517820061 is about 97559.3156033805. The cubic root of 9517820061 is about 2119.2352217258.

The spelling of 9517820061 in words is "nine billion, five hundred seventeen million, eight hundred twenty thousand, sixty-one".