259920949501 has 2 divisors, whose sum is σ = 259920949502. Its totient is φ = 259920949500.

The previous prime is 259920949433. The next prime is 259920949507. The reversal of 259920949501 is 105949029952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206728446276 + 53192503225 = 454674^2 + 230635^2 .

It is a cyclic number.

It is not a de Polignac number, because 259920949501 - 2¹⁷ = 259920818429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259920949507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129960474750 + 129960474751.

It is an arithmetic number, because the mean of its divisors is an integer number (129960474751).

Almost surely, 2^259920949501 is an apocalyptic number.

It is an amenable number.

259920949501 is a deficient number, since it is larger than the sum of its proper divisors (1).

259920949501 is an equidigital number, since it uses as much as digits as its factorization.

259920949501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 259920949501 in words is "two hundred fifty-nine billion, nine hundred twenty million, nine hundred forty-nine thousand, five hundred one".