78297739623 has 6 divisors (see below), whose sum is σ = 113096735024. Its totient is φ = 52198493076.

The previous prime is 78297739621. The next prime is 78297739643. The reversal of 78297739623 is 32693779287.

It is not a de Polignac number, because 78297739623 - 2¹ = 78297739621 is a prime.

It is a super-2 number, since 2×78297739623² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78297739621) 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 5 ways as a sum of consecutive naturals, for example, 4349874415 + ... + 4349874432.

Almost surely, 2^78297739623 is an apocalyptic number.

78297739623 is a deficient number, since it is larger than the sum of its proper divisors (34798995401).

78297739623 is a wasteful number, since it uses less digits than its factorization.

78297739623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8699748853 (or 8699748850 counting only the distinct ones).

The product of its digits is 48009024, while the sum is 63.

The spelling of 78297739623 in words is "seventy-eight billion, two hundred ninety-seven million, seven hundred thirty-nine thousand, six hundred twenty-three".