78429232678 has 8 divisors (see below), whose sum is σ = 118684945368. Its totient is φ = 38867584224.

The previous prime is 78429232639. The next prime is 78429232753. The reversal of 78429232678 is 87623292487.

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

It is a super-2 number, since 2×78429232678² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173515776 + ... + 173516227.

It is an arithmetic number, because the mean of its divisors is an integer number (14835618171).

Almost surely, 2^78429232678 is an apocalyptic number.

78429232678 is a deficient number, since it is larger than the sum of its proper divisors (40255712690).

78429232678 is a wasteful number, since it uses less digits than its factorization.

78429232678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347032118.

The product of its digits is 16257024, while the sum is 58.

It can be divided in two parts, 7842923 and 2678, that added together give a square (7845601 = 2801²).

The spelling of 78429232678 in words is "seventy-eight billion, four hundred twenty-nine million, two hundred thirty-two thousand, six hundred seventy-eight".