78297657829 has 4 divisors (see below), whose sum is σ = 78298655776. Its totient is φ = 78296659884.

The previous prime is 78297657803. The next prime is 78297657871. The reversal of 78297657829 is 92875679287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78297657829 - 2⁵ = 78297657797 is a prime.

It is a super-2 number, since 2×78297657829² (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 (78297657629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370209 + ... + 541894.

It is an arithmetic number, because the mean of its divisors is an integer number (19574663944).

Almost surely, 2^78297657829 is an apocalyptic number.

It is an amenable number.

78297657829 is a deficient number, since it is larger than the sum of its proper divisors (997947).

78297657829 is an equidigital number, since it uses as much as digits as its factorization.

78297657829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997946.

The product of its digits is 213373440, while the sum is 70.

The spelling of 78297657829 in words is "seventy-eight billion, two hundred ninety-seven million, six hundred fifty-seven thousand, eight hundred twenty-nine".