77393826939 has 32 divisors (see below), whose sum is σ = 121622312448. Its totient is φ = 43157952000.

The previous prime is 77393826907. The next prime is 77393826941. The reversal of 77393826939 is 93962839377.

It is not a de Polignac number, because 77393826939 - 2⁵ = 77393826907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77393826939.

It is not an unprimeable number, because it can be changed into a prime (77393826959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156622 + ... + 423459.

It is an arithmetic number, because the mean of its divisors is an integer number (3800697264).

Almost surely, 2^77393826939 is an apocalyptic number.

77393826939 is a deficient number, since it is larger than the sum of its proper divisors (44228485509).

77393826939 is a wasteful number, since it uses less digits than its factorization.

77393826939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580419.

The product of its digits is 92588832, while the sum is 66.

The spelling of 77393826939 in words is "seventy-seven billion, three hundred ninety-three million, eight hundred twenty-six thousand, nine hundred thirty-nine".