258312281378 has 18 divisors (see below), whose sum is σ = 400405134897. Its totient is φ = 124979032080.

The previous prime is 258312281369. The next prime is 258312281401. The reversal of 258312281378 is 873182213852.

258312281378 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 184954183969 + 73358097409 = 430063^2 + 270847^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=359383.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22275950 + ... + 22287542.

Almost surely, 2^258312281378 is an apocalyptic number.

258312281378 is a deficient number, since it is larger than the sum of its proper divisors (142092853519).

258312281378 is an frugal number, since it uses more digits than its factorization.

258312281378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23250 (or 11626 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

Multiplying 258312281378 by its sum of digits (50), we get a square (12915614068900 = 3593830²).

The spelling of 258312281378 in words is "two hundred fifty-eight billion, three hundred twelve million, two hundred eighty-one thousand, three hundred seventy-eight".