77622536506 has 4 divisors (see below), whose sum is σ = 116433804762. Its totient is φ = 38811268252.

The previous prime is 77622536471. The next prime is 77622536513. The reversal of 77622536506 is 60563522677.

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., 68937228481 + 8685308025 = 262559^2 + 93195^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 77622536506.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19405634125 + ... + 19405634128.

Almost surely, 2^77622536506 is an apocalyptic number.

77622536506 is a deficient number, since it is larger than the sum of its proper divisors (38811268256).

77622536506 is a wasteful number, since it uses less digits than its factorization.

77622536506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38811268255.

The product of its (nonzero) digits is 3175200, while the sum is 49.

The spelling of 77622536506 in words is "seventy-seven billion, six hundred twenty-two million, five hundred thirty-six thousand, five hundred six".