77555493099767 has 4 divisors (see below), whose sum is σ = 77596161949656. Its totient is φ = 77514824249880.

The previous prime is 77555493099727. The next prime is 77555493099787. The reversal of 77555493099767 is 76799039455577.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77555493099767 - 2⁶ = 77555493099703 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 (77555493099727) 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, 20334422084 + ... + 20334425897.

It is an arithmetic number, because the mean of its divisors is an integer number (19399040487414).

Almost surely, 2^{77555493099767} is an apocalyptic number.

77555493099767 is a deficient number, since it is larger than the sum of its proper divisors (40668849889).

77555493099767 is a wasteful number, since it uses less digits than its factorization.

77555493099767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40668849888.

The product of its (nonzero) digits is 15752961000, while the sum is 83.

The spelling of 77555493099767 in words is "seventy-seven trillion, five hundred fifty-five billion, four hundred ninety-three million, ninety-nine thousand, seven hundred sixty-seven".