238479617399991 has 16 divisors (see below), whose sum is σ = 347368695208320. Its totient is φ = 144329246572320.

The previous prime is 238479617399971. The next prime is 238479617399999. The reversal of 238479617399991 is 199993716974832.

It is not a de Polignac number, because 238479617399991 - 2²¹ = 238479615302839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 238479617399898 and 238479617399907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238479617399999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5096348305 + ... + 5096395098.

It is an arithmetic number, because the mean of its divisors is an integer number (21710543450520).

Almost surely, 2^{238479617399991} is an apocalyptic number.

238479617399991 is a deficient number, since it is larger than the sum of its proper divisors (108889077808329).

238479617399991 is a wasteful number, since it uses less digits than its factorization.

238479617399991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10192744126.

The product of its digits is 9999593856, while the sum is 87.

The spelling of 238479617399991 in words is "two hundred thirty-eight trillion, four hundred seventy-nine billion, six hundred seventeen million, three hundred ninety-nine thousand, nine hundred ninety-one".