9720146865 has 128 divisors (see below), whose sum is σ = 19486656000. Its totient is φ = 4064624640.

The previous prime is 9720146819. The next prime is 9720146869. The reversal of 9720146865 is 5686410279.

It is not a de Polignac number, because 9720146865 - 2⁹ = 9720146353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9720146869) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5432391 + ... + 5434179.

It is an arithmetic number, because the mean of its divisors is an integer number (152239500).

Almost surely, 2^9720146865 is an apocalyptic number.

It is an amenable number.

9720146865 is an abundant number, since it is smaller than the sum of its proper divisors (9766509135).

9720146865 is a wasteful number, since it uses less digits than its factorization.

9720146865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 9720146865 is about 98590.8051747220. The cubic root of 9720146865 is about 2134.1467312641.

It can be divided in two parts, 972014 and 6865, that added together give a palindrome (978879).

The spelling of 9720146865 in words is "nine billion, seven hundred twenty million, one hundred forty-six thousand, eight hundred sixty-five".