78320771935 has 16 divisors (see below), whose sum is σ = 107543826432. Its totient is φ = 53639431200.

The previous prime is 78320771923. The next prime is 78320771939. The reversal of 78320771935 is 53917702387.

It is not a de Polignac number, because 78320771935 - 2⁹ = 78320771423 is a prime.

It is a super-2 number, since 2×78320771935² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78320771939) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1351231 + ... + 1408000.

It is an arithmetic number, because the mean of its divisors is an integer number (6721489152).

Almost surely, 2^78320771935 is an apocalyptic number.

78320771935 is a deficient number, since it is larger than the sum of its proper divisors (29223054497).

78320771935 is a wasteful number, since it uses less digits than its factorization.

78320771935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760054.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 78320771935 in words is "seventy-eight billion, three hundred twenty million, seven hundred seventy-one thousand, nine hundred thirty-five".