77894936149 has 16 divisors (see below), whose sum is σ = 84209368320. Its totient is φ = 71896829760.

The previous prime is 77894936137. The next prime is 77894936191. The reversal of 77894936149 is 94163949877.

It is a cyclic number.

It is not a de Polignac number, because 77894936149 - 2¹¹ = 77894934101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77894936549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 605922 + ... + 723139.

It is an arithmetic number, because the mean of its divisors is an integer number (5263085520).

Almost surely, 2^77894936149 is an apocalyptic number.

It is an amenable number.

77894936149 is a deficient number, since it is larger than the sum of its proper divisors (6314432171).

77894936149 is a wasteful number, since it uses less digits than its factorization.

77894936149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329180.

The product of its digits is 82301184, while the sum is 67.

The spelling of 77894936149 in words is "seventy-seven billion, eight hundred ninety-four million, nine hundred thirty-six thousand, one hundred forty-nine".