259795720921 has 16 divisors (see below), whose sum is σ = 295763465088. Its totient is φ = 225888220800.

The previous prime is 259795720909. The next prime is 259795721023. The reversal of 259795720921 is 129027597952.

It is a happy number.

259795720921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 259795720921 - 2¹⁵ = 259795688153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259795720901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3064261 + ... + 3147901.

It is an arithmetic number, because the mean of its divisors is an integer number (18485216568).

Almost surely, 2^259795720921 is an apocalyptic number.

It is an amenable number.

259795720921 is a deficient number, since it is larger than the sum of its proper divisors (35967744167).

259795720921 is a wasteful number, since it uses less digits than its factorization.

259795720921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95952.

The product of its (nonzero) digits is 7144200, while the sum is 58.

The spelling of 259795720921 in words is "two hundred fifty-nine billion, seven hundred ninety-five million, seven hundred twenty thousand, nine hundred twenty-one".