77148940578 has 8 divisors (see below), whose sum is σ = 154297881168. Its totient is φ = 25716313524.

The previous prime is 77148940577. The next prime is 77148940607. The reversal of 77148940578 is 87504984177.

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

77148940578 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (77148940577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6429078376 + ... + 6429078387.

It is an arithmetic number, because the mean of its divisors is an integer number (19287235146).

Almost surely, 2^77148940578 is an apocalyptic number.

77148940578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77148940578 is a wasteful number, since it uses less digits than its factorization.

77148940578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12858156768.

The product of its (nonzero) digits is 15805440, while the sum is 60.

The spelling of 77148940578 in words is "seventy-seven billion, one hundred forty-eight million, nine hundred forty thousand, five hundred seventy-eight".