78308057578 has 8 divisors (see below), whose sum is σ = 118118299680. Its totient is φ = 38935291020.

The previous prime is 78308057561. The next prime is 78308057587. The reversal of 78308057578 is 87575080387.

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

It is a super-2 number, since 2×78308057578² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109368438 + ... + 109369153.

It is an arithmetic number, because the mean of its divisors is an integer number (14764787460).

Almost surely, 2^78308057578 is an apocalyptic number.

78308057578 is a deficient number, since it is larger than the sum of its proper divisors (39810242102).

78308057578 is a wasteful number, since it uses less digits than its factorization.

78308057578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218737772.

The product of its (nonzero) digits is 13171200, while the sum is 58.

The spelling of 78308057578 in words is "seventy-eight billion, three hundred eight million, fifty-seven thousand, five hundred seventy-eight".