259296488978 has 30 divisors (see below), whose sum is σ = 399853046439. Its totient is φ = 126111306348.

The previous prime is 259296488977. The next prime is 259296489079. The reversal of 259296488978 is 879884692952.

It can be written as a sum of positive squares in only one way, i.e., 129648244489 + 129648244489 = 360067^2 + 360067^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=360067.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 259296488899 and 259296488908.

It is not an unprimeable number, because it can be changed into a prime (259296488977) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1590775925 + ... + 1590776087.

Almost surely, 2^259296488978 is an apocalyptic number.

259296488978 is a deficient number, since it is larger than the sum of its proper divisors (140556557461).

259296488978 is an frugal number, since it uses more digits than its factorization.

259296488978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 212 counting only the distinct ones).

The product of its digits is 1254113280, while the sum is 77.

The spelling of 259296488978 in words is "two hundred fifty-nine billion, two hundred ninety-six million, four hundred eighty-eight thousand, nine hundred seventy-eight".