260505237878 has 16 divisors (see below), whose sum is σ = 402721851840. Its totient is φ = 126308205576.

The previous prime is 260505237871. The next prime is 260505237887. The reversal of 260505237878 is 878732505062.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260505237871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10884200 + ... + 10908107.

It is an arithmetic number, because the mean of its divisors is an integer number (25170115740).

Almost surely, 2^260505237878 is an apocalyptic number.

260505237878 is a deficient number, since it is larger than the sum of its proper divisors (142216613962).

260505237878 is a wasteful number, since it uses less digits than its factorization.

260505237878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21792491.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 260505237878 in words is "two hundred sixty billion, five hundred five million, two hundred thirty-seven thousand, eight hundred seventy-eight".