258134121842 has 4 divisors (see below), whose sum is σ = 387201182766. Its totient is φ = 129067060920.

The previous prime is 258134121811. The next prime is 258134121857. The reversal of 258134121842 is 248121431852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 248660798281 + 9473323561 = 498659^2 + 97331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 258134121842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64533530459 + ... + 64533530462.

Almost surely, 2^258134121842 is an apocalyptic number.

258134121842 is a deficient number, since it is larger than the sum of its proper divisors (129067060924).

258134121842 is a wasteful number, since it uses less digits than its factorization.

258134121842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129067060923.

The product of its digits is 122880, while the sum is 41.

The spelling of 258134121842 in words is "two hundred fifty-eight billion, one hundred thirty-four million, one hundred twenty-one thousand, eight hundred forty-two".