13421520258578 has 16 divisors (see below), whose sum is σ = 20281180143840. Its totient is φ = 6661146226176.

The previous prime is 13421520258569. The next prime is 13421520258593. The reversal of 13421520258578 is 87585202512431.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3446600 + ... + 6222707.

It is an arithmetic number, because the mean of its divisors is an integer number (1267573758990).

Almost surely, 2^{13421520258578} is an apocalyptic number.

13421520258578 is a deficient number, since it is larger than the sum of its proper divisors (6859659885262).

13421520258578 is a wasteful number, since it uses less digits than its factorization.

13421520258578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9674441.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 13421520258578 in words is "thirteen trillion, four hundred twenty-one billion, five hundred twenty million, two hundred fifty-eight thousand, five hundred seventy-eight".