76779375648 has 24 divisors (see below), whose sum is σ = 201545861328. Its totient is φ = 25593125184.

The previous prime is 76779375641. The next prime is 76779375653. The reversal of 76779375648 is 84657397767.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (76779375641) 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, 399892486 + ... + 399892677.

It is an arithmetic number, because the mean of its divisors is an integer number (8397744222).

Almost surely, 2^76779375648 is an apocalyptic number.

It is an amenable number.

76779375648 is an abundant number, since it is smaller than the sum of its proper divisors (124766485680).

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

76779375648 is a wasteful number, since it uses less digits than its factorization.

76779375648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799785176 (or 799785168 counting only the distinct ones).

The product of its digits is 373403520, while the sum is 69.

The spelling of 76779375648 in words is "seventy-six billion, seven hundred seventy-nine million, three hundred seventy-five thousand, six hundred forty-eight".