77699817082 has 4 divisors (see below), whose sum is σ = 116549725626. Its totient is φ = 38849908540.

The previous prime is 77699817037. The next prime is 77699817149. The reversal of 77699817082 is 28071899677.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 62430519321 + 15269297761 = 249861^2 + 123569^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19424954269 + ... + 19424954272.

Almost surely, 2^77699817082 is an apocalyptic number.

77699817082 is a deficient number, since it is larger than the sum of its proper divisors (38849908544).

77699817082 is a wasteful number, since it uses less digits than its factorization.

77699817082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38849908543.

The product of its (nonzero) digits is 21337344, while the sum is 64.

The spelling of 77699817082 in words is "seventy-seven billion, six hundred ninety-nine million, eight hundred seventeen thousand, eighty-two".