77700978905 has 32 divisors (see below), whose sum is σ = 103108239360. Its totient is φ = 55738687680.

The previous prime is 77700978893. The next prime is 77700978919. The reversal of 77700978905 is 50987900777.

It is not a de Polignac number, because 77700978905 - 2⁶ = 77700978841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4610324 + ... + 4627146.

It is an arithmetic number, because the mean of its divisors is an integer number (3222132480).

Almost surely, 2^77700978905 is an apocalyptic number.

It is an amenable number.

77700978905 is a deficient number, since it is larger than the sum of its proper divisors (25407260455).

77700978905 is a wasteful number, since it uses less digits than its factorization.

77700978905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17981.

The product of its (nonzero) digits is 7779240, while the sum is 59.

The spelling of 77700978905 in words is "seventy-seven billion, seven hundred million, nine hundred seventy-eight thousand, nine hundred five".