78465272578678 has 32 divisors (see below), whose sum is σ = 124802291812320. Its totient is φ = 36871215843840.

The previous prime is 78465272578663. The next prime is 78465272578739. The reversal of 78465272578678 is 87687527256487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749427300 + ... + 749531992.

It is an arithmetic number, because the mean of its divisors is an integer number (3900071619135).

Almost surely, 2^{78465272578678} is an apocalyptic number.

78465272578678 is a deficient number, since it is larger than the sum of its proper divisors (46337019233642).

78465272578678 is a wasteful number, since it uses less digits than its factorization.

78465272578678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136512.

The product of its digits is 17702092800, while the sum is 82.

The spelling of 78465272578678 in words is "seventy-eight trillion, four hundred sixty-five billion, two hundred seventy-two million, five hundred seventy-eight thousand, six hundred seventy-eight".