78790592111989 has 8 divisors (see below), whose sum is σ = 80734506026328. Its totient is φ = 76847734967040.

The previous prime is 78790592111983. The next prime is 78790592112031. The reversal of 78790592111989 is 98911129509787.

It can be written as a sum of positive squares in 4 ways, for example, as 15164715756100 + 63625876355889 = 3894190^2 + 7976583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78790592111989 - 2¹¹ = 78790592109941 is a prime.

It is a super-2 number, since 2×78790592111989² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78790592111983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264041392 + ... + 264339625.

It is an arithmetic number, because the mean of its divisors is an integer number (10091813253291).

Almost surely, 2^{78790592111989} is an apocalyptic number.

It is an amenable number.

78790592111989 is a deficient number, since it is larger than the sum of its proper divisors (1943913914339).

78790592111989 is a wasteful number, since it uses less digits than its factorization.

78790592111989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528384695.

The product of its (nonzero) digits is 205752960, while the sum is 76.

The spelling of 78790592111989 in words is "seventy-eight trillion, seven hundred ninety billion, five hundred ninety-two million, one hundred eleven thousand, nine hundred eighty-nine".