77760002101 has 4 divisors (see below), whose sum is σ = 77760607392. Its totient is φ = 77759396812.

The previous prime is 77760002093. The next prime is 77760002137. The reversal of 77760002101 is 10120006777.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10120006777 = 173 ⋅58497149.

It is a cyclic number.

It is not a de Polignac number, because 77760002101 - 2³ = 77760002093 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 (77760002161) 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 3 ways as a sum of consecutive naturals, for example, 25105 + ... + 395158.

It is an arithmetic number, because the mean of its divisors is an integer number (19440151848).

Almost surely, 2^77760002101 is an apocalyptic number.

It is an amenable number.

77760002101 is a deficient number, since it is larger than the sum of its proper divisors (605291).

77760002101 is a wasteful number, since it uses less digits than its factorization.

77760002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605290.

The product of its (nonzero) digits is 4116, while the sum is 31.

Adding to 77760002101 its reverse (10120006777), we get a palindrome (87880008878).

The spelling of 77760002101 in words is "seventy-seven billion, seven hundred sixty million, two thousand, one hundred one".