259968778 has 8 divisors (see below), whose sum is σ = 390022272. Its totient is φ = 129961356.

The previous prime is 259968769. The next prime is 259968803. The reversal of 259968778 is 877869952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13201 + ... + 26347.

It is an arithmetic number, because the mean of its divisors is an integer number (48752784).

Almost surely, 2^259968778 is an apocalyptic number.

259968778 is a deficient number, since it is larger than the sum of its proper divisors (130053494).

259968778 is a wasteful number, since it uses less digits than its factorization.

259968778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23036.

The product of its digits is 15240960, while the sum is 61.

The square root of 259968778 is about 16123.5473144094. The cubic root of 259968778 is about 638.2248808442.

The spelling of 259968778 in words is "two hundred fifty-nine million, nine hundred sixty-eight thousand, seven hundred seventy-eight".