77954245977 has 8 divisors (see below), whose sum is σ = 110053053216. Its totient is φ = 48912468032.

The previous prime is 77954245961. The next prime is 77954245979.

77954245977 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 77954245977 - 2⁴ = 77954245961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77954245979) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 764257263 + ... + 764257364.

It is an arithmetic number, because the mean of its divisors is an integer number (13756631652).

Almost surely, 2^77954245977 is an apocalyptic number.

It is an amenable number.

77954245977 is a deficient number, since it is larger than the sum of its proper divisors (32098807239).

77954245977 is a wasteful number, since it uses less digits than its factorization.

77954245977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528514647.

The product of its digits is 155584800, while the sum is 66.

The spelling of 77954245977 in words is "seventy-seven billion, nine hundred fifty-four million, two hundred forty-five thousand, nine hundred seventy-seven".