78739345223 has 8 divisors (see below), whose sum is σ = 98168534400. Its totient is φ = 61355333880.

The previous prime is 78739345163. The next prime is 78739345229. The reversal of 78739345223 is 32254393787.

It is a happy number.

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 78739345223 - 2¹² = 78739341127 is a prime.

It is a super-2 number, since 2×78739345223² (a number of 23 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 (78739345229) by changing a digit.

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, 511294373 + ... + 511294526.

It is an arithmetic number, because the mean of its divisors is an integer number (12271066800).

Almost surely, 2^78739345223 is an apocalyptic number.

78739345223 is a deficient number, since it is larger than the sum of its proper divisors (19429189177).

78739345223 is a wasteful number, since it uses less digits than its factorization.

78739345223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022588917.

The product of its digits is 7620480, while the sum is 53.

The spelling of 78739345223 in words is "seventy-eight billion, seven hundred thirty-nine million, three hundred forty-five thousand, two hundred twenty-three".